Adjectives Are Stative Verbs (No 是)

Here is the single most useful idea for an English speaker learning to describe things in Chinese: an adjective is already a verb. 高 does not mean "tall" — it means "to be tall." So when you say 她很高, you are not saying "she [is] tall" with a missing verb; the verb is right there, built into 高. This is why Chinese has no copula 是 before adjectives — the "to be" is already inside the word. English speakers reliably insert 是 out of habit (她是高, a word-for-word copy of "she *is tall"), and it is wrong every time. Grasping that adjectives are stative verbs reframes the entire Adjectives group, so it's worth slowing down on.

An adjective is already a verb — drop 是

In English, "tall," "busy," and "expensive" are just descriptions; you need the verb "to be" to turn them into a statement. In Chinese, 高, 忙, and 贵 are the statement. They stand as the whole predicate by themselves, the way any verb does. The copula 是 links two nouns (他是老师 "he is a teacher") — it has no role in front of an adjective.

The bare adjective usually wants 很

There's a twist that surprises learners. A lone adjective predicate normally needs a little word in front of it — most often 很. But 很 here is not "very." It has been bleached into a neutral prop that lets a single adjective stand as a complete, balanced statement. A bare 天气好 doesn't sound neutral — it sounds contrastive, as if comparing ("the weather's good [but…]"). Adding 很 makes it a plain, standalone fact. This is covered in full on the default 很 page.

To mean a genuine "very," you stress the 很 or swap in a stronger degree word — 非常 (extremely), 真 (really), 太…了 (too). Because 高 is a verb, it also takes these degree adverbs directly, just as it takes negation directly.

Negation: 不, not 是不 and not 没

Since the adjective is the verb, you negate it the way you negate any state verb: put 不 straight in front of it. 不高 "isn't tall," 不忙 "isn't busy." Two English-driven errors to kill here: don't reach back for 是 (there's no 是 to negate — 不是高), and don't use 没. 没 negates *having done something or existence; a present adjectival state takes 不.

You also question an adjective as its own verb — with the A-not-A shape, no 是 anywhere. 累不累？ ("tired-not-tired?"), 贵不贵？ ("expensive or not?").

When 是 does come back

是 isn't banished forever — it returns in specific patterns, and knowing them keeps the "no 是" rule honest. The main one is the 是…的 frame, which turns a quality into a classifying assertion: 这件衣服是红的 ("this garment is [a] red [one]"). Here 是 links to a nominalized 红的 ("a red one"), not to a bare adjective — a different construction, taught on the 是…的 emphasis page. You'll also hear a stressed 是 for emphatic contrast (他是很聪明，可是不用功 "he is smart, but he doesn't work hard"), where 是 asserts the truth of the whole clause rather than serving as a copula.

Common Mistakes

1. Inserting 是 before an adjective. The number-one transfer error, straight from "she is tall." The adjective already carries "to be."

2. Using 是 in the negative. There's no copula to negate — 不 goes straight on the adjective.

3. Negating an adjective with 没. A present state takes 不; 没 negates completion or existence.

4. Dropping the degree word in a plain statement. A bare adjective predicate sounds contrastive; a neutral statement wants 很.

Key Takeaways

• A Chinese adjective is a stative verb: 高 means "to be tall," so it predicates alone — no 是. Never *她是高.
• A plain adjective statement usually needs 很 (a neutral prop, not "very"): 我很忙, 天气很好. See the default 很 page.
• Negate with 不, right on the adjective (不高, 不忙, 不冷) — not 是不, not 没. See negating adjectives with 不.
• Question with A-not-A (累不累？贵不贵？), no 是 needed.
• 是 only returns in the 是…的 frame (这件是红的) and emphatic contrast — never as a plain copula before an adjective.