Comparative & Superlative

"Mein Bruder ist ält___ als ich", and the hand hesitates. Does it become älter? Or was there a second l? This is exactly where intuition fails, not grammar: the umlaut on short adjectives (alt becomes älter) and the inserted -e- before -sten on adjectives ending in -d, -t, -s, -ß, -z (breit becomes am breitesten) are the two spots where even advanced German learners stumble.

Comparison endings belong to the inflectional-endings category, which makes up roughly a fifth of all C-test gaps overall. Within that category, though, comparison is a narrower slice, clearly smaller than verb or adjective endings. The course labels this topic "beginner", which is fair for the basic rules (-er, am -sten), but it slightly overpredicts the payoff: not a big point lever, but once you have the umlaut and -est traps locked in, you never lose an easy point here again.

Quick rule: -er = comparative, am …-sten = superlative. One-syllable adjectives with a/o/u get an umlaut (älter, größer). After the superlative signal “am”, -sten is almost always missing.

The three degrees

An adjective has three degrees. The positive is the plain form (schnell). The comparative compares two things and takes -er (schneller). The superlative is the peak and reads am ...-sten (am schnellsten).

The ending -er simply attaches, and -sten does the same. Memorize the basic pattern schnell -- schneller -- am schnellsten like a little tune, and in the C-test you will instantly hear which syllable is missing.

Anna runs faster, but Clara is the fastest in the race. Fill in the comparison:

Umlaut in short adjectives

Many one-syllable adjectives take an umlaut when compared: a becomes ä, o becomes ö, u becomes ü. This affects both the comparative and the superlative. For the C-test this means: if the deleted part contains the vowel, an umlaut may be hidden there.

Careful: not every short adjective takes an umlaut. voll, klar, bunt, froh, rasch and flach, for example, stay plain (voller, am vollsten). There is no fixed rule for which do and which don't, so it pays to read the list above out loud a few times.

Your brother is older, but grandpa stayed the youngest? Put jung into comparative and superlative:

-est after -d, -t, -s, -ß, -z

When an adjective ends in -d, -t, -s, -ß or -z, am ...-sten is hard to pronounce (am breitsten?). So the superlative slips in an extra -e-: -esten instead of -sten. Important: only the superlative gets this extra e; the comparative stays normal with -er.

So the comparative is breiter (no extra e), but the superlative is am breitesten. This distinction is a classic C-test trap: the gap brei___ wants -er, while the gap am breit___ wants -esten.

Which street is the widest? Compare breit:

Irregular comparison

A handful of very common adjectives and adverbs are compared completely irregularly. You have to know these by heart, because no ending rule helps here. Precisely because they are so frequent (gut, viel, gern), they show up especially often in the C-test.

Watch the small stumbling blocks: hoch loses the c in the comparative (höher), nah becomes näher / am nächsten, and groß takes the umlaut but no extra-e superlative (am größten, not am größesten). With teuer and dunkel the e before the r or l drops out: teurer, dunkler.

Here is a free head start: German breaks its regular pattern for gut/besser/am besten and viel/mehr/am meisten for exactly the same two everyday words English breaks its own pattern for, good/better/best and much/more/most. It is a coincidence, not a rule you can lean on elsewhere, but it is a useful one: if better and more already feel automatic to you, you only need to remap that same intuition onto besser and mehr.

The irregulars must be automatic. Fill in all forms:

Grandma cooks the best of all. Compare the irregular gut:

Two superlative forms

The superlative has two faces. Standing alone after the verb (predicative) or as an adverb, it reads am ...-sten. Standing directly before a noun (attributive), it takes an article and the ending -ste: der/die/das schnellste.

Rule of thumb: if a noun comes right after, you need der/die/das ...-ste. If the superlative sits at the end of the sentence or describes an action, use am ...-sten.

„als" or „wie"?

When you compare, one tiny word makes the decision, and in the C-test it likes to become the gap. After a comparative you compare with als (inequality). For equality you use so ... wie.

Memory hook: if a comparative (ending -er) is in the sentence, als almost always follows. If so appears, a wie is waiting at the end. Everyday speech mixes these up (größer wie), but in the onSET only the correct form with als counts.

Quick decision

When a comparison gap appears in the C-test, run through this short list:

1. Which degree? Comparing two things → comparative (-er). The peak → superlative (am ...-sten or der/die/das ...-ste).
2. Umlaut? A short adjective with a, o, u (alt, jung, groß)? Then it turns into ä, ö, ü.
3. Ending -d, -t, -s, -ß, -z? Then use -esten instead of -sten in the superlative (am breitesten).
4. Irregular? gut → besser → am besten, viel → mehr → am meisten, gern → lieber → am liebsten, hoch → höher, nah → näher. By heart, no rule.
5. Before a noun? Then der/die/das ...-ste instead of am ...-sten.
6. als or wie? Comparative → als. Equality (so ...) → wie.

Boss gap

This gap folds both signal words into one sentence: als after a comparative, wie for equality. Nail both at once here, and you have truly mastered the topic.

Common mistakes

• ❌ Berlin ist größer wie Wien. → ✓ Berlin ist größer als Wien. Why: After a comparative it is always als, never wie.

• ❌ am größesten → ✓ am größten Why: groß is compared irregularly and, despite the -ß, takes no extra e in the superlative.

• ❌ am breitsten → ✓ am breitesten Why: After -t the superlative slips in an -e-: -esten.

• ❌ das gutste Buch → ✓ das beste Buch Why: gut is irregular: gut → besser → best-.

• ❌ Er ist mehr groß als ich. → ✓ Er ist größer als ich. Why: German compares with endings, not with mehr (unlike English more).

It's exactly the irregular forms and the umlaut cases that trip people up under time pressure. Use the Practice button below this page to drill älter, am besten, and am breitesten until your hand stops hesitating.