Start with the skill and its owner
A skill statement tells the listener what someone is able to do. Begin with a subject such as I, a name, or a group, add can, and name the activity with a base verb. The base is the dictionary form without to: cook, read, or drive. English still needs an expressed subject in an ordinary complete statement; the modal alone does not identify the person. Unlike a regular present verb, can does not acquire an ending with she or he. A person may have a skill without using it at this moment, so the sentence does not necessarily describe an action happening now. A useful introduction therefore pairs a person with an activity before adding details about the activity.
I can cook rice.
The speaker knows how to prepare rice.
The skill follows the modal as a base verb. Rice is a mass noun in this ordinary food meaning, so the sentence does not need an indefinite article before it.
Maya can drive.
Maya has the skill needed to drive.
The subject names one person, but the modal remains unchanged. This is a statement about a skill, and it does not say that Maya is driving at the moment.
Keep the modal and the following verb separate
The modal carries the ability meaning, while the following verb tells us which activity is possible. Neither word changes when I becomes she or they. Compare She speaks English with She can speak English. The first presents a fact about her language use; the second explicitly presents ability. Both may describe the same person, but their structures are different. Do not place am, is, or are before can. The phrase be able to is another construction, useful later, and mixing pieces of the two creates an error. Also learn ordinary object pronouns after the activity verb: help me and understand her. The pronoun after the verb identifies the person receiving help, not the subject who has the ability.
She can speak English.
She has the ability to speak English.
The modal is already present, so the activity stays in its base form. The sentence preserves the singular subject without adding an extra ending to the second verb.
They can help me.
The group can help the speaker.
The group is the subject, and the speaker receives the help. An object pronoun belongs after help; changing the number of helpers does not change that object role.
Follow a complete example
Build a sentence with this meaning: She has the ability to speak English. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: She has the ability to speak English. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- The modal is already present, so the activity stays in its base form. The sentence preserves the singular subject without adding an extra ending to the second verb.
- Now read the complete sentence, She can speak English. Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
She can speak English. She has the ability to speak English.
State a limitation with cannot or can’t
To deny ability, place not with the modal. The full written form is normally one word, cannot, while can’t is a common contraction in speech and ordinary informal writing. The activity verb still stays in its base form. A negative skill statement should say only what you mean: not being able to drive does not mean disliking driving, and being unable to help now does not always mean lacking the skill. Time and circumstance can explain the limitation. Listen for the whole phrase because unstressed can and a negative contraction can be difficult to distinguish in fast speech. Pronunciation differs across accents, so practice with a complete meaningful sentence and ask for clarification if the answer matters.
I can’t swim.
The speaker does not have the ability to swim.
The negative belongs to the modal and leaves swim unchanged. This reports a limitation in ability; it does not make a separate claim about whether the speaker enjoys water.
We cannot meet today.
A meeting today is not possible for the group.
The full negative form is written as one word in this ordinary use. Today explains the current limitation, which may be a scheduling problem rather than a permanent lack of ability.
References for this explanation
Ask about ability without do
For a direct question, move can before the subject: Can you swim? The activity verb remains after the subject, and no form of do is needed. Add a question word at the beginning when you need particular information: What can you cook? Notice the different information requested. The first question can receive a yes or no answer; the second asks for a dish or type of food. Question punctuation helps a reader, but punctuation alone does not turn ordinary statement order into the neutral question pattern taught here. In conversation people also use echo questions with statement order, often to express surprise. Learn those later and use the clear inversion pattern for ordinary information requests now.
Can your brother repair bikes?
Ask whether your brother has this repair skill.
The modal goes before the complete subject phrase. Repair remains a base verb even though brother names one person, and the question asks about ability rather than frequency.
What can you cook?
Ask which dishes the listener is able to prepare.
The information word comes first, followed by modal and subject. The remaining verb names the activity, while the question word stands for the information the listener should supply.
References for this explanation
Answer the question you actually heard
A short reply repeats the modal and uses the subject from the answerer’s viewpoint: Yes, I can or No, I can’t. The question may contain you, but the person answering about themself uses I. Do not substitute do simply because a yes or no answer is short. A full reply can add a useful limit, such as the language you read or the day you are available. Frequency expressions can also refine a statement: I can usually help after work describes usual availability rather than a promise for every day. The adverb normally fits after this modal and before the main verb. Choose a reply that addresses the requested ability before adding a related but different detail.
Can you read this? Yes, I can.
Give a positive short answer about your own ability.
The reply keeps the same modal as the question and changes the listener pronoun to the speaker’s viewpoint. The activity can be omitted because the question already supplies it.
I can usually help after work.
The speaker is normally available to help after work.
Usually fits between the modal and the main verb. The extra adverb does not change the required base form, and after work limits the availability to a particular part of the day.
References for this explanation
Separate ability, requests, and permission
Context gives can several everyday uses. Can you open the window? normally requests an action when the window is nearby; it is rarely a test of the listener’s physical skill. Can I open the window? normally asks permission because the speaker proposes doing it. The subject therefore matters to the social meaning as well as the grammar. Could you often makes a request less direct, and it can refer to an action now rather than a past action. Neither expression guarantees courtesy: tone, situation, and please also matter. Permission replies commonly use can, even when the request used could. Keep this distinction clear so that you do not mechanically move a permission reply into a past form.
Can I sit here?
The speaker asks permission to take this seat.
The subject identifies the person who wants to act. Using the first person makes this a permission request about the speaker, while the surrounding situation supplies the practical meaning.
Could you open the door, please?
Ask the listener courteously to open the door now.
Could is functioning as a request here, not as a report about an earlier skill. Like can, it takes a base verb, and please helps make the intended request clear.
Try the reasoning with less help
Build a sentence with this meaning: The speaker asks permission to take this seat. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: The speaker asks permission to take this seat. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- The subject identifies the person who wants to act. Using the first person makes this a permission request about the speaker, while the surrounding situation supplies the practical meaning.
- Now read the complete sentence, Can I sit here? Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
Compare your reasoning
Can I sit here? The speaker asks permission to take this seat.
References for this explanation
Place ability on a timeline carefully
Use could for a general ability in the past, such as a skill someone had as a child. It does not change with the subject and still takes a base verb. Contrast this with can for present ability or present availability for a future event. I can help tomorrow is possible because tomorrow describes when the available help can occur; English does not require a future auxiliary in every sentence about tomorrow. A successful single past event needs more care. I managed to open it or I was able to open it can emphasize an achieved result, whereas could alone often describes capacity. This beginner lesson tests clear general past skills and present availability. It does not claim that every occurrence of could refers to the past, or that all uses involving a single event are forbidden.
When I was six, I could read.
Report a general reading skill that the speaker had at age six.
The age phrase places the ability in a completed past period. Could describes the general skill, and read is the unchanged base verb after the modal.
I can meet you tomorrow.
The speaker is available for a meeting the next day.
Tomorrow supplies a future time, while can expresses present availability for that meeting. The sentence needs the base activity verb and does not require will before the modal.
Notice the difference
Common mistakes
Keep the verb after can in its base form
Instead ofShe can speaks French.
For this meaningShe can speak French.
The third person ending is appropriate in she speaks, but a preceding modal changes the verb pattern. The subject is still singular; English simply marks this modal construction differently. Diagnose the entire verb group instead of repairing only the final word. Then change she to they and notice that can speak remains the same.
Do not use do with a modal question
Instead ofDo you can swim?
For this meaningCan you swim?
The modal itself moves before the subject. The ordinary helper do is needed in questions such as do you swim, which ask a different question about an activity or habit. Remove the extra helper rather than removing can and accidentally losing the ability meaning.
Match the short answer to the modal
Instead ofCan you help? Yes, I do.
For this meaningCan you help? Yes, I can.
A short answer can omit the repeated activity because the question establishes it. It still retains the relevant modal. The pronoun changes with the speaker’s perspective, while can keeps its form. A more useful answer can add a limit, such as after lunch, if a simple yes would otherwise suggest unlimited availability.
From understanding to using
Make your own example.
Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.
Your turn 1
Describe two skills: you can cook, but you cannot drive. Write one connected sentence before checking the model.
Compare with a model
I can cook, but I can’t drive.
The speaker can prepare food but does not have the ability to drive.
Both activities use the same subject, so repeat it for clarity in this model. Each modal is followed by a base verb. The conjunction joins a positive skill and a contrasting limitation. The negative tells us about ability, not preference. You could replace the contraction with the full form without changing the basic message, then change the subject to your sister and check that the modal still does not gain an ending.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Your turn 2
A classmate asks whether you can help tomorrow. Say yes, then ask whether they can meet at four.
Compare with a model
Yes, I can. Can you meet at four?
The speaker confirms availability and asks about a meeting time.
First match the modal in the incoming question. The answer uses the speaker’s viewpoint, while the new question addresses the classmate. Move the modal before the subject in that question and retain the base verb. The time phrase narrows the practical arrangement. Availability for tomorrow is compatible with can; adding will before can would break this construction.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Put it into practice
Make the next choice.
Choose a response and learn why it works. Your score reflects your first answer to each question. You can revisit anything you miss.
Choose an answer, then open the explanation to check your reasoning.
Question 1
Complete the sentence for this meaning: The speaker knows how to prepare rice.
I can ___ rice.
- cook
- to cook
Check the answer
Answer: cook
cook: The skill follows the modal as a base verb. Rice is a mass noun in this ordinary food meaning, so the sentence does not need an indefinite article before it.
to cook: A modal does not take the infinitive marker here. Keep the base verb directly after can; the construction differs from want to cook.
Question 2
Complete the sentence for this meaning: Maya has the skill needed to drive.
Maya ___ drive.
- cans
- can
Check the answer
Answer: can
cans: The ordinary present ending belongs to verbs such as drives. It is not added to this modal, even when the subject is a single person.
can: The subject names one person, but the modal remains unchanged. This is a statement about a skill, and it does not say that Maya is driving at the moment.
Question 3
Complete the sentence for this meaning: She has the ability to speak English.
She can ___ English.
- speak
- speaks
Check the answer
Answer: speak
speak: The modal is already present, so the activity stays in its base form. The sentence preserves the singular subject without adding an extra ending to the second verb.
speaks: The ending is correct in she speaks, but it disappears after can. Combining the modal with a present form applies two incompatible patterns to the same verb group.
Question 4
Complete the sentence for this meaning: The group can help the speaker.
They can help ___.
- I
- me
Check the answer
Answer: me
I: This is a subject pronoun. It would identify the person doing an action at the beginning of a clause, not the person receiving help after this verb.
me: The group is the subject, and the speaker receives the help. An object pronoun belongs after help; changing the number of helpers does not change that object role.
Question 5
Complete the sentence for this meaning: The speaker does not have the ability to swim.
I ___ swim.
- can’t
- don’t can
Check the answer
Answer: can’t
can’t: The negative belongs to the modal and leaves swim unchanged. This reports a limitation in ability; it does not make a separate claim about whether the speaker enjoys water.
don’t can: Can forms its own negative. Adding the ordinary present helper do before it produces a structure that standard English does not use.
Question 6
Complete the sentence for this meaning: A meeting today is not possible for the group.
We ___ meet today.
- cannot to
- cannot
Check the answer
Answer: cannot
cannot to: The full negative still behaves as a modal and takes a base verb. Writing the infinitive marker before meet incorrectly changes the construction.
cannot: The full negative form is written as one word in this ordinary use. Today explains the current limitation, which may be a scheduling problem rather than a permanent lack of ability.
Question 7
Complete the sentence for this meaning: Ask whether your brother has this repair skill.
___ your brother repair bikes?
- Can
- Does can
Check the answer
Answer: Can
Can: The modal goes before the complete subject phrase. Repair remains a base verb even though brother names one person, and the question asks about ability rather than frequency.
Does can: A modal already supplies the helper needed for inversion. Adding does creates an extra helper and does not form the ordinary direct question.
Question 8
Complete the sentence for this meaning: Ask which dishes the listener is able to prepare.
What ___ cook?
- you can
- can you
Check the answer
Answer: can you
you can: That order fits some embedded clauses, but this is an ordinary direct question. The modal must precede the subject in the question pattern being practiced.
can you: The information word comes first, followed by modal and subject. The remaining verb names the activity, while the question word stands for the information the listener should supply.
Question 9
Complete the sentence for this meaning: Give a positive short answer about your own ability.
Can you read this? Yes, I ___.
- can
- do
Check the answer
Answer: can
can: The reply keeps the same modal as the question and changes the listener pronoun to the speaker’s viewpoint. The activity can be omitted because the question already supplies it.
do: Do answers a question built with do in this basic pattern. This question asks with can, so its ordinary short answer repeats can.
Question 10
Complete the sentence for this meaning: The speaker is normally available to help after work.
I can usually ___ after work.
- helps
- help
Check the answer
Answer: help
helps: An adverb between the two verbs does not cancel the modal pattern. The activity must remain in its base form, regardless of the subject or the added frequency information.
help: Usually fits between the modal and the main verb. The extra adverb does not change the required base form, and after work limits the availability to a particular part of the day.
Question 11
Complete the sentence for this meaning: The speaker asks permission to take this seat.
Can ___ sit here?
- I
- you
Check the answer
Answer: I
I: The subject identifies the person who wants to act. Using the first person makes this a permission request about the speaker, while the surrounding situation supplies the practical meaning.
you: That subject asks the listener to sit or asks about the listener’s ability. It changes who would perform the action and does not express the requested permission for the speaker.
Question 12
Complete the sentence for this meaning: Ask the listener courteously to open the door now.
Could you ___ the door, please?
- opened
- open
Check the answer
Answer: open
opened: A past form after could does not build this present request. The modal itself has several meanings, but the following activity verb remains in its base form.
open: Could is functioning as a request here, not as a report about an earlier skill. Like can, it takes a base verb, and please helps make the intended request clear.
Question 13
Complete the sentence for this meaning: Report a general reading skill that the speaker had at age six.
When I was six, I ___ read.
- could
- can
Check the answer
Answer: could
could: The age phrase places the ability in a completed past period. Could describes the general skill, and read is the unchanged base verb after the modal.
can: Can is the ordinary present ability form. This exercise asks for a skill during the stated childhood period, so the past ability form is needed.
Question 14
Complete the sentence for this meaning: The speaker is available for a meeting the next day.
I can ___ you tomorrow.
- will meet
- meet
Check the answer
Answer: meet
will meet: English does not normally combine these two modals in this order. Use can meet for availability or will meet for a different future construction, without stacking them.
meet: Tomorrow supplies a future time, while can expresses present availability for that meeting. The sentence needs the base activity verb and does not require will before the modal.
Conversation builder
Plan the cooking together
Arrange the turns so that each reply answers the preceding request or choice. Follow references to food, activities, and the next practical step.
- Can you help with dinner?
Maya asks for help preparing dinner.
- Yes, I can. What do we need to make?
Leo accepts and asks what the task is.
- We need rice and soup. Can you cook rice?
Maya names the food and asks about a skill.
- Yes, I can cook rice, but I can’t make soup.
Leo confirms one skill and explains a limitation.
- That’s fine. I can make the soup.
Maya takes responsibility for the other dish.
- Great. Could you show me where the rice is?
Leo requests the location of his ingredient.
- Of course. It’s in this cupboard.
Maya answers the location request.
Keep the conversation going
What to practice next
Return to the production tasks after a break. Reconstruct your sentences without the models, compare the meaning and form, and repair any error by explaining its cause. Then use one sentence in a short exchange of your own.
Sources and editorial notes
By Loquus ·
Source checked with AI assistance
These original lessons synthesize the cited sources with AI assistance. They have not been certified by an independent human language specialist. Usage limits and regional differences are stated where relevant.
- British Council LearnEnglish: Ability
- British Council LearnEnglish: Modal verbs
- British Council LearnEnglish: Personal pronouns
- British Council LearnEnglish: Uncount nouns
- British Council LearnEnglish: Present simple
- British Council LearnEnglish: Verbs followed by an infinitive
- British Council LearnEnglish: Can and could
- British Council LearnEnglish: Questions and negatives
- British Council LearnEnglish: How often
- British Council LearnEnglish: Requests, offers and invitations
- British Council LearnEnglish: Permission
- British Council LearnEnglish Kids: Past simple of be
- British Council LearnEnglish: Talking about the future
Learning research behind the practice
Worked examples, retrieval practice, and later review inform the activities. These studies do not establish the effectiveness of this specific lesson.
- Karpicke and Roediger: The critical importance of retrieval for learning
- Butler and Roediger: Feedback enhances the positive effects and reduces the negative effects of multiple choice testing
- Institute of Education Sciences: Organizing Instruction and Study to Improve Student Learning
- Rittle Johnson and Star: Compared to what?