Chinese Adjectives as Stative Verbs: Why “Is” Often Vanishes

The “missing is” is not missing

One of the first surprises in Mandarin is that sentences like 天气很冷, 他很忙, 这本书不贵, and 房间大 do not need 是. English requires “is” because adjectives normally need a copula: “The weather is cold.” Mandarin adjectives such as 冷, 忙, 贵, 好, 高, 大, and 漂亮 can function as predicates themselves. They behave like stative verbs: words that describe a state and can stand where a verb-like predicate is needed.

This does not mean 是 disappears randomly. It means 是 is not the default link between a subject and an adjective. Mandarin usually uses 是 to identify a noun phrase: 他是老师, 这是问题, 那是我的书. For adjective predicates, Mandarin normally uses the adjective directly, often with a degree word such as 很, 太, 非常, 比较, 特别, 不, 更, or 最.

Basic frames

Why 很 appears so often

Textbooks often translate 很 as “very,” but in simple adjective-predicate sentences it can be partly a degree word and partly a structural/rhythmic support. 他忙 can be grammatical, but it often feels contrastive or clipped: “He is busy,” perhaps in contrast with someone else or as an answer. 他很忙 is the ordinary neutral full sentence. Depending on context, it may mean “he is busy” rather than strongly “he is very busy.”

This is why learners should not delete 很 mechanically, but also should not overtranslate it.

When 是 appears with adjectives

是 can appear near adjectives, but not as a simple English-style copula in ordinary description.

The rule is not “never use 是 with adjectives.” The rule is “do not insert 是 simply because English has ‘is.’”

Repair table

Stative adjective behavior

Mandarin adjectives can take adverbial modification much like verbs:

• 很贵 — expensive / quite expensive
• 不贵 — not expensive
• 太贵了 — too expensive
• 更贵 — more expensive
• 最贵 — most expensive
• 比较贵 — relatively expensive
• 越来越贵 — getting more and more expensive

They can also participate in result/degree expressions:

• 热起来了 — became warmer / heated up
• 好一点儿 — a little better
• 贵得离谱 — outrageously expensive
• 累得不行 — terribly tired

Diagnostic drill

Choose 是 or no 是:

1. 他 ___ 医生。 → 是: noun identification.
2. 他 ___ 很累。 → usually no 是: adjective predicate.
3. 这个问题 ___ 复杂。 → usually 很复杂 or 比较复杂.
4. 问题 ___ 复杂的。 → 是 possible in formal/emphatic property classification.
5. 天气 ___ 越来越冷。 → no 是.
6. 这 ___ 我的书。 → 是.

Build an is-or-not decision tree. Users classify the predicate after the subject: noun phrase, adjective/stative predicate, location phrase, possession/existence, or emphatic 是…的. The tool rewrites English-shaped sentences into natural Mandarin and explains why 很 sometimes appears even when “very” is not intended.

Quality-pass expansion: adjective predicates and degree expectations

Add a “bare adjective” warning. Mandarin can use bare adjectives, but beginners often underlearn the discourse effect.

Add “是 + adjective” caution

The article should explicitly explain that 是 + adjective may occur in contrastive correction:

• 他是高，可是不壮。 — He is tall, but not sturdy.
• 这个办法是好，就是成本太高。 — The method is good, but the cost is too high.

This prevents readers from turning a beginner rule into a false absolute. The publication version should frame the rule as: ordinary adjective predicates do not need 是; 是 appears when the sentence is doing identification, emphasis, contrast, or formal property classification.

Remediation and upgrade pass: stative verbs without fake absolutes

Predicate adjective ladder

The remediation point: 很 is often a grammatical/rhythmic degree support in ordinary description, not always emphatic “very.” But it is not meaningless either. It helps the adjective function smoothly as a predicate.

Where 是 belongs

Use 是 for identity/category noun phrases:

• 他是老师。 — He is a teacher.
• 这是问题。 — This is a problem.
• 那是重点。 — That is the key point.

Do not use ordinary 是 before a simple adjective unless there is a special discourse reason:

• Weak: 天气是冷。
• Natural: 天气很冷。
• Contrastive: 天气是冷，但是风不大。

Add adjective-as-verb reading notes

In formal or technical writing, adjectives can look like properties rather than casual descriptions:

• 成本较高 — cost is relatively high.
• 风险较大 — risk is relatively large/high.
• 效果明显 — effect is clear/significant.
• 条件成熟 — conditions are mature/ready.

These are still predicate structures. English may require “is,” but Mandarin does not need a separate copula.

Repair lab

Publication note

Do not tell readers “Chinese has no adjective.” That overcorrects. The useful explanation is: many Mandarin adjectives behave like stative predicates, so English “be + adjective” often maps to adjective predicate, not 是 + adjective.