Choose the relationship before choosing the word
A comparison identifies a property and relates two things through it. In Das Zimmer ist größer als die Küche, the property is size, and the room is larger than the kitchen. In Das Zimmer ist so groß wie die Küche, their sizes are equal for the purpose of the statement. The choice between als and wie follows that difference in meaning. Do not choose the connector simply because English has a comparison word somewhere in the sentence.
The two basic patterns are comparative plus als and so plus the ordinary adjective plus wie. Dieser Tee ist billiger als der Kaffee compares prices, while Dieser Tee ist so teuer wie der Kaffee says the prices are equal. The examples do not tell you that tea is generally cheaper than coffee; they compare the particular items in the situation. Before making a sentence, state in plain English whether the two things differ or match on the relevant property. Then choose the German pattern. This first decision prevents a common error: adding a comparative ending while still using the equality connector. Keep the comparison small enough that you can clearly identify both items and the property linking them.
Watch the decision
Compare a five euro book with a ten euro bag using cheaper.
- Identify the lower priced item: the book.
- Use billiger to describe its lower price.
- Introduce the more expensive comparison item with als.
Das Buch ist billiger als die Tasche.
Build equality with so or genauso and wie
The equality frame keeps the ordinary adjective form: Mira ist so groß wie Tom. It can also use genauso: Mira ist genauso groß wie Tom. Both describe equal height in this context. The adjective groß does not become größer, because the sentence is not saying that one person exceeds the other. You can compare other properties in the same frame, such as Das Buch ist so teuer wie die Tasche.
Negative equality needs careful interpretation. Das Buch ist nicht so teuer wie die Tasche normally presents the book as less expensive in this ordinary price comparison. It does not mean the two prices are identical. Do not assume that every sentence containing wie must express a positive equality claim; nicht can change that relationship. Keep the target property and the intended direction explicit when practicing. If the task says that two prices are exactly the same, use the positive equality frame. If one is lower, a direct comparative such as billiger can make the intended comparison especially clear. For production, begin with two equal numbers or two matching descriptions, then make the sentence. A concrete shared value is useful evidence that you have chosen equality for a reason rather than relying on the visual similarity of the options.
Complete the reasoning
Say that Mira and Tom have equal height.
- Choose equality rather than a comparative.
- Keep the adjective groß in its ordinary form.
- Use the frame so groß wie around the comparison.
Compare your reasoning
Mira ist so groß wie Tom.
Form useful comparatives without inventing a universal spelling rule
Many German comparatives add er: klein becomes kleiner, and schnell becomes schneller. Some common adjectives also change their vowel: groß becomes größer, alt becomes älter, and kalt becomes kälter. Learn these as complete useful pairs. The presence of a, o or u in an adjective does not guarantee that its comparative will have an umlaut.
A few frequent forms need separate attention. Gut becomes besser, and viel becomes mehr. Teuer commonly becomes teurer, with a shortened ending inside the word. These forms are easier to retrieve if you connect each one to a real comparison: Heute ist es kälter als gestern or Dieses Buch ist teurer als das andere. Avoid constructing English style more expensive by putting mehr before an ordinary adjective in the basic pattern taught here. Use teurer for that adjective. Mehr itself is useful when the thing compared is an amount, such as time, rather than the degree of an adjective. The aim is a small reliable set of comparative forms, not a claim that you can derive every German comparison from one spelling formula. Check unfamiliar forms in a dictionary before using them in an important message.
Use als after the comparative and keep the sentence frame
A basic comparison follows the familiar statement structure: Das Buch ist billiger als die Tasche. The subject is das Buch, the finite verb is ist, and billiger describes the book relative to the comparison item. Als introduces that item. Do not move ist to the end merely because als appears; this is a short comparison phrase, not the temporal dependent clause use of als.
Questions retain their ordinary structure too. Ist das Buch billiger als die Tasche? asks for confirmation, while Was ist billiger? asks which thing is cheaper. When a time expression comes first, Heute ist der Tee billiger als gestern keeps the finite verb in second constituent position. The comparison phrase does not cancel that rule. In simple subject comparisons, use the subject form of a personal pronoun: Mira ist größer als ich. A full expansion is Mira ist größer, als ich bin, which makes the underlying subject relationship visible. This lesson practices the short subject comparison with ich rather than treating every word after als as automatically accusative. Other comparisons can involve different grammatical roles, so avoid a universal case rule based only on the connector.
References for this explanation
- University of Texas Grimm Grammar: Comparative and superlative
- University of Texas Grimm Grammar: Time adverbs
- University of Texas Grimm Grammar: Word order
- University of Texas Grimm Grammar: Question words
- University of Texas Grimm Grammar: Nominative pronouns
- University of Texas Grimm Grammar: Nominative
Separate a describing adjective from a noun phrase ending
The adjective after sein in our simple comparisons does not receive an extra noun phrase ending: Der Tisch ist kleiner and Die Tische sind kleiner. The plural subject changes ist to sind, but kleiner stays the same. The comparative er belongs to the degree of the adjective. It is not a plural ending or an agreement marker for the subject.
Before a noun, adjective endings are a separate issue. Compare Ich kaufe einen kleineren Tisch, I am buying a smaller table. The adjective now appears inside a masculine accusative noun phrase after einen, so the comparative stem kleiner receives an additional ending. Do not conclude from this one example that every comparative always ends in en. The full adjective ending system depends on the determiner, case, gender and number of the noun phrase. This lesson keeps most productive practice after sein so that you can focus on comparison without mastering that whole system at once. Still, recognizing the difference helps when reading a shop description or a longer sentence. Ask two questions separately: is the property being compared, and is the adjective placed before a noun? The first determines the comparative stem; the second may require an additional grammatical ending.
References for this explanation
- University of Texas Grimm Grammar: Comparative and superlative
- University of Texas Grimm Grammar: Adjectives and placement
- University of Texas Grimm Grammar: Sein
- University of Texas Grimm Grammar: Articles
- University of Texas Grimm Grammar: Accusative
- University of Texas Grimm Grammar: Noun gender
- University of Texas Grimm Grammar: Noun plurals
Compare quantities and actions with the right familiar word
Mehr compares an amount. Ich habe mehr Zeit als du means I have more time than you. It does not say that my time is bigger or older. Wir haben mehr Bücher als ihr compares a count of books, while the subject wir controls haben. The number of books does not determine the verb agreement. In both sentences, als introduces the comparison counterpart.
An action can also be compared. Mira spricht schneller als Tom says Mira speaks faster than Tom. Schnell describes how the speaking happens, and schneller compares that manner. It does not need a noun phrase ending because it is not sitting before a noun inside an object phrase. For preference, German uses lieber in patterns such as Ich trinke lieber Tee als Kaffee, I prefer drinking tea to coffee. This is a useful comparison word to recognize, but it is not the comparative of gut. Keep the sets separate: gut and besser concern how good something is, while gern and lieber express liking or preference in these activity patterns. When deciding what to say, name whether you are comparing an amount, a property, a manner or a preference. That meaning guides the form more reliably than substituting one universal word for more.
References for this explanation
- University of Texas Grimm Grammar: Comparative and superlative
- University of Texas Grimm Grammar: Noun plurals
- University of Texas Grimm Grammar: Gefallen and gern
- University of Texas Grimm Grammar: Sprechen
- University of Texas Grimm Grammar: Haben
- University of Texas Grimm Grammar: Present regular verbs
Make a useful choice and state the limits of the comparison
Comparisons help with decisions, but the sentence should identify what is being compared. Das ist besser may work when two options are visible, yet it leaves the comparison standard implicit. Dieses Zimmer ist größer als das andere is clearer when the listener needs to know which rooms are involved. A comparative does not mean best among every possible option; it compares relative to an expressed or understood standard.
A superlative such as am besten or am größten makes a different claim, so do not use it as an automatic stronger version of every beginner comparison. This lesson focuses on two items and one relevant property. In a shopping scenario, one bag can be cheaper while another is larger. Those facts do not by themselves decide which is better for the buyer. For retrieval, look at two simple descriptions and write one difference and one equality statement if the facts permit both. Then turn one of your statements into a yes or no question. Before the game, check the direction carefully: if one price is lower, name the cheaper item as the subject of billiger. A grammatically tidy sentence can still reverse the facts, so meaning and form deserve separate checks.
See it in a sentence
Das Zimmer ist größer als die Küche.
The room is larger than the kitchen.
A comparative takes als in this standard pattern.
Das Zimmer ist so groß wie die Küche.
The room is as large as the kitchen.
Equality uses so and wie.
Mira ist genauso groß wie Tom.
Mira is exactly as tall as Tom.
The ordinary adjective remains groß.
Das Buch ist nicht so teuer wie die Tasche.
The book is not as expensive as the bag.
Nicht changes the equality relationship.
Heute ist es kälter als gestern.
It is colder today than yesterday.
Kalt has the comparative kälter.
Das Buch ist teurer als die Tasche.
The book is more expensive than the bag.
Teuer commonly becomes teurer.
Ist das Buch billiger als die Tasche?
Is the book cheaper than the bag?
The question starts with the finite verb.
Mira ist größer als ich.
Mira is taller than I am.
The pronoun represents the subject of the comparison.
Die Tische sind kleiner.
The tables are smaller.
The predicate comparative has no extra plural ending.
Ich kaufe einen kleineren Tisch.
I am buying a smaller table.
The comparative before a noun takes an additional ending.
Ich habe mehr Zeit als du.
I have more time than you.
Mehr compares an amount.
Ich trinke lieber Tee als Kaffee.
I prefer drinking tea to coffee.
Lieber expresses the preference in this activity pattern.
Notice the difference
Common mistakes
Keep equality and difference separate
Instead ofDas Zimmer ist größer wie die Küche.
For this meaningDas Zimmer ist größer als die Küche.
The target standard construction uses als after a comparative expressing a difference. To express equality, change the whole frame to so groß wie rather than changing only the connector.
Learn irregular comparative forms
Instead ofDas ist guter.
For this meaningDas ist besser.
The comparative of gut is besser. Do not assume that adding er to the ordinary adjective produces every comparative.
Do not add noun phrase endings after sein
Instead ofDie Tische sind kleineren.
For this meaningDie Tische sind kleiner.
The comparative describes the subject after sein and has no additional adjective ending here. The plural subject changes the finite verb to sind, not the predicate form to kleineren.
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
A room and kitchen have equal size, but the room is colder. Write both comparisons.
Compare with a model
Das Zimmer ist so groß wie die Küche. Das Zimmer ist kälter als die Küche.
The room is as large as the kitchen. The room is colder than the kitchen.
The first sentence uses the equality frame with the ordinary adjective groß. The second uses the comparative kälter and als. One pair of objects can match on one property and differ on another, so the relationship must be selected separately each time.
- Use wie for equal size.
- Use kälter for temperature.
- Keep the comparison direction consistent.
Your turn 2
Say that you have more time than your friend, then ask whether their book is cheaper than your bag.
Compare with a model
Ich habe mehr Zeit als du. Ist dein Buch billiger als meine Tasche?
I have more time than you. Is your book cheaper than my bag?
Mehr compares the amount of time, while billiger compares price. The question begins with ist. The possessed objects remain distinct, so dein identifies the friend’s book and meine identifies your bag without changing the comparison connector.
- Use mehr with Zeit.
- Use als in both unequal comparisons.
- Start the question with ist.
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
Two rooms have the same size.
- Das Zimmer ist so groß wie die Küche.
- Das Zimmer ist größer als die Küche.
Check the answer
Answer: Das Zimmer ist so groß wie die Küche.
Das Zimmer ist so groß wie die Küche.: So groß wie expresses equal size.
Das Zimmer ist größer als die Küche.: Größer als says the room exceeds the kitchen in size.
Question 2
The room is larger than the kitchen.
- Das Zimmer ist größer wie die Küche.
- Das Zimmer ist größer als die Küche.
Check the answer
Answer: Das Zimmer ist größer als die Küche.
Das Zimmer ist größer wie die Küche.: Wie is not the standard connector after this unequal comparative.
Das Zimmer ist größer als die Küche.: Standard unequal comparison uses comparative plus als.
Question 3
Mira and Tom are equally tall.
- Mira ist genauso groß wie Tom.
- Mira ist genauso größer als Tom.
Check the answer
Answer: Mira ist genauso groß wie Tom.
Mira ist genauso groß wie Tom.: Genauso combines with the ordinary adjective and wie.
Mira ist genauso größer als Tom.: This mixes equality wording with an unequal comparative.
Question 4
Today is colder than yesterday.
- Heute ist es kalter als gestern.
- Heute ist es kälter als gestern.
Check the answer
Answer: Heute ist es kälter als gestern.
Heute ist es kalter als gestern.: This misses the umlaut in the intended comparative.
Heute ist es kälter als gestern.: The comparative of kalt is kälter.
Question 5
One option is better than another.
- Das ist besser.
- Das ist guter.
Check the answer
Answer: Das ist besser.
Das ist besser.: Gut has the irregular comparative besser.
Das ist guter.: Guter is not the comparative form.
Question 6
A book costs more than a bag.
- Das Buch ist mehr teuer als die Tasche.
- Das Buch ist teurer als die Tasche.
Check the answer
Answer: Das Buch ist teurer als die Tasche.
Das Buch ist mehr teuer als die Tasche.: The basic German adjective comparison is not formed with mehr plus teuer.
Das Buch ist teurer als die Tasche.: Teurer is the comparative used here.
Question 7
Ask whether the book is cheaper.
- Ist das Buch billiger als die Tasche?
- Das Buch billiger ist als die Tasche?
Check the answer
Answer: Ist das Buch billiger als die Tasche?
Ist das Buch billiger als die Tasche?: The yes or no question begins with ist.
Das Buch billiger ist als die Tasche?: This does not follow the ordinary question frame.
Question 8
Compare Mira’s height with your own in the standard subject comparison.
- Mira ist größer als mich.
- Mira ist größer als ich.
Check the answer
Answer: Mira ist größer als ich.
Mira ist größer als mich.: Mich is an object form rather than the subject form required here.
Mira ist größer als ich.: Ich represents the subject in the comparison, as in als ich bin.
Question 9
Several tables are smaller.
- Die Tische sind kleiner.
- Die Tische sind kleineren.
Check the answer
Answer: Die Tische sind kleiner.
Die Tische sind kleiner.: The adjective after sein has no extra noun phrase ending.
Die Tische sind kleineren.: The added en does not belong in this predicate use.
Question 10
You are buying a smaller table.
- Ich kaufe einen kleiner Tisch.
- Ich kaufe einen kleineren Tisch.
Check the answer
Answer: Ich kaufe einen kleineren Tisch.
Ich kaufe einen kleiner Tisch.: The predicate form alone lacks the required adjective ending here.
Ich kaufe einen kleineren Tisch.: The comparative before the masculine accusative noun takes an additional ending.
Question 11
You have a greater amount of time.
- Ich habe mehr Zeit als du.
- Ich habe größer Zeit als du.
Check the answer
Answer: Ich habe mehr Zeit als du.
Ich habe mehr Zeit als du.: Mehr compares an amount of time.
Ich habe größer Zeit als du.: Größer does not form this quantity comparison.
Question 12
Mira speaks at a greater speed than Tom.
- Mira sprechen schneller als Tom.
- Mira spricht schneller als Tom.
Check the answer
Answer: Mira spricht schneller als Tom.
Mira sprechen schneller als Tom.: The comparative does not change the required subject agreement.
Mira spricht schneller als Tom.: The singular subject Mira takes spricht.
Question 13
Your preference is tea over coffee.
- Ich trinke lieber Tee als Kaffee.
- Ich trinke besser Tee als Kaffee.
Check the answer
Answer: Ich trinke lieber Tee als Kaffee.
Ich trinke lieber Tee als Kaffee.: Lieber states the intended preference.
Ich trinke besser Tee als Kaffee.: Besser does not express that preference in this pattern.
Question 14
The bag costs ten euros and the book costs five.
- Die Tasche ist billiger als das Buch.
- Das Buch ist billiger als die Tasche.
Check the answer
Answer: Das Buch ist billiger als die Tasche.
Die Tasche ist billiger als das Buch.: This reverses the prices described in the scenario.
Das Buch ist billiger als die Tasche.: The lower priced book is the subject of billiger.
Keep the conversation going
What to practice next
Use one new example in a sentence of your own. Then revisit the challenge without looking at the explanation.
Sources and editorial notes
By Loquus ·
Source checked with AI assistance
Explanations and examples were checked against inspected sources with AI assistance. No independent human language certification is claimed.
- University of Texas Grimm Grammar: Comparative and superlative
- University of Texas Grimm Grammar: Adjectives and placement
- University of Texas Grimm Grammar: Sein
- University of Texas Grimm Grammar: Nouns overview
- University of Texas Grimm Grammar: Negation
- University of Texas Grimm Grammar: Articles
- University of Texas Grimm Grammar: Time adverbs
- University of Texas Grimm Grammar: Word order
- University of Texas Grimm Grammar: Question words
- University of Texas Grimm Grammar: Nominative pronouns
- University of Texas Grimm Grammar: Nominative
- University of Texas Grimm Grammar: Accusative
- University of Texas Grimm Grammar: Noun gender
- University of Texas Grimm Grammar: Noun plurals
- University of Texas Grimm Grammar: Gefallen and gern
- University of Texas Grimm Grammar: Sprechen
- University of Texas Grimm Grammar: Haben
- University of Texas Grimm Grammar: Present regular verbs
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.