tā bùdàn hěn cōngming, érqiě hěn chéngshí, suǒyǐ dàjiā dōu yuànyì gēn tā hézuò.

不但……而且…… means not only... but also...

In this sentence:

• 她不但很聪明，而且很诚实
• She is not only very smart, but also very honest

A few useful points:

• 不但 introduces the first point.
• 而且 introduces the second point.
• The second point often adds something that feels like an extra strength or an even more important point.

This pattern is very common in Mandarin.

Example pattern:

• 他不但会说中文，而且会写汉字。
• He can not only speak Chinese, but also write Chinese characters.

In Mandarin, adjectives can often function like predicates by themselves, so you do not need a verb like to be in the same way English does.

So:

• 她很聪明 = She is smart
• 她很诚实 = She is honest

It is not natural to say 她是聪明 for She is smart.

Use 是 mainly when one noun equals another noun, for example:

• 她是老师。 = She is a teacher.

But with adjectives like 聪明 and 诚实, you normally do not use 是.

This is one of the most common questions for English speakers.

很 literally can mean very, but in many basic adjective sentences it often works more like a grammatical marker that makes the sentence sound natural.

So:

• 她很聪明 usually just means She is smart
• not necessarily She is very smart

The same goes for:

• 她很诚实 = She is honest

If you leave out 很, the sentence can sound like a comparison or contrast in some contexts.

So Mandarin often prefers:

• 她很聪明 instead of
• 她聪明

unless there is a special context.

Yes, you can, and it is understandable.

• 她不但聪明，而且诚实。

This sounds a bit more compact and sometimes a little more formal or literary.

But for many learners, keeping 很 is safer and more natural in everyday speech:

• 她不但很聪明，而且很诚实。

So both are possible, but the version with 很 is very common and comfortable.

所以 means so, therefore, or that’s why.

The sentence is structured like this:

• 她不但很聪明，而且很诚实，所以大家都愿意跟她合作。

That means:

• She is not only smart but also honest, so everyone is willing to work with her.

It connects the reason and the result:

• Reason: 她不但很聪明，而且很诚实
• Result: 大家都愿意跟她合作

This is a very common connector in Mandarin.

都 means all or both/everyone involved.

Here:

• 大家 = everyone
• 都愿意 = all are willing

So:

• 大家都愿意跟她合作 = Everyone is willing to cooperate with her.

In Mandarin, 都 often appears after the subject and before the verb/adjective:

• 我们都喜欢她。 = We all like her.
• 他们都来了。 = They all came.

Even though 大家 already suggests everyone, 都 is still very natural and commonly used.

愿意 means to be willing to, to be ready to, or to be inclined to.

So:

• 大家都愿意跟她合作 means
• Everyone is willing to work with her.

This is a little different from 想, which usually means want to.

Compare:

• 我想去。 = I want to go.
• 我愿意去。 = I am willing to go.

A simple way to remember the difference:

• 想 = desire / want
• 愿意 = willingness

In this sentence, 愿意 fits well because it describes people’s readiness to cooperate with her because of her good qualities.

Yes, you can also say 和她合作.

In this sentence, 跟 means with:

• 跟她合作 = cooperate with her / work with her

Very similar options are:

• 跟她合作
• 和她合作

Both are natural.

A few notes:

• 跟 is very common in spoken Mandarin.
• 和 is also common and may feel slightly more neutral or written in some contexts.
• In everyday conversation, both are fine.

So learners can safely use either one here.

Here, 合作 is a verb meaning to cooperate or to work together.

So:

• 跟她合作 = cooperate with her

But 合作 can also be used as a noun in other contexts, depending on the sentence.

Examples:

• 我们合作吧。 = Let’s cooperate.
  → verb

• 这次合作很成功。 = This collaboration was very successful.
  → noun

This kind of flexibility is common in Mandarin vocabulary.

Because the two 她 words do different jobs.

• The first 她 is the subject: she
• The second 她 is the object of 跟: with her

So the structure is:

• 她 ... = She ...
• 跟她合作 = cooperate with her

This repetition is completely normal and necessary.

English also does the same thing:

• She is smart, so everyone wants to work with her.

Yes. In this sentence, both are adjectives:

• 聪明 = smart, intelligent
• 诚实 = honest

They describe her qualities.

Because adjectives in Mandarin can act directly as predicates, they work naturally in sentences like:

• 她很聪明。
• 她很诚实。

This is one reason Mandarin sentence structure can feel different from English.

Yes. 不但 and 不仅 are both common and both can mean not only.

So you could also say:

• 她不仅很聪明，而且很诚实。

This means the same thing.

In many situations:

• 不但……而且……
• 不仅……而且……

are interchangeable.

Learners should know both, because both are very common in real Mandarin.

A few small things may help:

• 她 is tā with the first tone.
• 不但 is bùdàn. The 不 here stays fourth tone because the next syllable 但 is also fourth tone in citation form, though in connected speech learners may hear some variation.
• 而且 is érqiě.
• 诚实 is chéngshí.
• 合作 is hézuò.

One especially useful point:

• 聪明 is often pronounced cōngming
• The second syllable 明 is often light/unstressed in natural speech

So even though learners may first learn cōngmíng, in real speech cōngming is very common.

That kind of lighter second syllable happens in many everyday words.