Adjective Predicates: Why 很 Appears and 是 Does Not

In the last article we hit the big trap: you don't use 是 before an adjective, you use 很 instead. So 她很高兴 (she's happy), not 她是高兴. This article explains why that happens and what 很 is really doing, because once it makes sense, you'll stop second-guessing it.

Adjectives are already verbs

Here's the core idea. In Chinese, an adjective doesn't need a linking word to attach it to the subject, because the adjective itself acts like a verb. 高兴 doesn't just mean "happy," it means something closer to "to be happy." The "is" is baked in.

So when you say 她高兴, you've technically already got a complete sentence: "she is-happy." There's no gap for 是 to fill. That's why adding it (她是高兴) is wrong. You'd be doubling up on the "is."

This is the opposite of English, where "happy" is just a description and needs "is" to glue it to the subject. In Chinese, the adjective does both jobs at once.

So why does 很 show up everywhere?

If 她高兴 is already complete, why do people almost always say 她很高兴? Two reasons.

First, a bare adjective predicate sounds incomplete or implies a comparison. If you say just 她高兴 with nothing else, it feels like it's setting up a contrast: "She's happy (but someone else isn't)." It leaves the listener waiting for the other shoe to drop.

Second, 很 literally means "very," but in this everyday pattern it's lost most of its punch. It's become a kind of default filler that makes the sentence sound balanced and complete, without really meaning "very" at all. So 她很高兴 is just the normal, neutral way to say "she's happy," not "she's very happy."

If you genuinely want to stress "very," you'd lean on the word with your voice, or reach for a stronger word like 非常 (extremely): 她非常高兴 (she's really happy).

The basic pattern

Put together, the everyday adjective sentence looks like this:

Subject + 很 + Adjective

• 今天很热。 (It's hot today.)
• 这个问题很难。 (This problem is hard.)
• 他的房间很干净。 (His room is clean.)
• 我很累。 (I'm tired.)

No 是 anywhere. Just subject, 很, adjective.

Negating and questioning

To make it negative, use 不, and here 很 drops out:

• 今天不热。 (It's not hot today.)
• 这个问题不难。 (This problem isn't hard.)

To ask a yes/no question, add 吗 (and again 很 usually drops):

• 今天热吗? (Is it hot today?)

Or use the A-not-A pattern:

• 今天热不热? (Is it hot today, or not?)

So 很 mainly belongs to the plain positive statement. Once you negate or question, it steps aside.

When 很 actually means "very"

To be clear, 很 hasn't stopped meaning "very." In contexts where the comparison is doing real work, or where you stress it, it carries its full weight:

• 她很高兴,我更高兴。 (She's very happy, I'm even happier.) Here 很 stands in contrast to 更 (more), so it really means "very."

You don't have to police this distinction. Just know that in a plain statement 很 is mostly neutral filler, and don't translate every 很 as "very" in your head or your sentences will sound oddly intense.

Quick recap

• Chinese adjectives act like verbs, so they don't need 是.
• A bare adjective sounds incomplete or comparative, so you add 很 as a neutral filler.
• Everyday pattern: Subject + 很 + Adjective (今天很热).
• In negatives and questions, 很 drops out (今天不热 / 今天热吗?).
• 很 still means "very" when it's stressed or contrasted, but usually it's just smoothing the sentence.

Lock this in and the 是/很 question stops being a thing you have to think about. Nouns take 是, adjectives take 很, and now you know why.