tā jīnwǎn dàgài huì chàng.

The sentence follows a very common Mandarin pattern:

Subject + time + adverb + modal verb + main verb

So here:

• 她 = subject
• 今晚 = time expression
• 大概 = adverb of probability
• 会 = modal verb
• 唱 = main verb

A very natural way to think of it is:

She + tonight + probably + will + sing

Mandarin often puts the time expression early, usually before the main verb.

In Mandarin, time words usually appear near the beginning of the sentence, often right after the subject.

So this order is very natural:

• 她今晚大概会唱

rather than putting 今晚 later.

A useful rule of thumb is:

Subject + when + how/attitude + verb

So:

• 她 = who
• 今晚 = when
• 大概 = probably
• 会唱 = will sing

You may sometimes hear other orders in real speech, but this sentence uses a very standard and natural one.

Here, 会 means something like will / is likely to in reference to the future.

In Mandarin, 会 can have different meanings depending on context:

• ability learned by practice: 我会唱歌 = I can sing / I know how to sing
• future or likelihood: 她今晚会唱 = She will sing tonight

In this sentence, because there is 今晚 and 大概, 会 is understood as a future-related modal, not ability.

So here it is not saying that she has the skill of singing. It is saying that singing is expected to happen tonight.

大概 means probably, roughly, or about, depending on context.

In this sentence, it expresses uncertainty or a guess:

• 她今晚会唱 = she will sing tonight
• 她今晚大概会唱 = she will probably sing tonight

So 大概 makes the statement less certain.

It is a little like saying:

• I think she’ll probably sing tonight
• She is likely to sing tonight

Good question. 唱 often appears with an object such as:

• 唱歌 = sing songs / sing
• 唱戏 = sing opera
• 唱这首歌 = sing this song

But in Mandarin, the object can be omitted if it is obvious or not important.

So 唱 by itself is perfectly possible when the context already makes the meaning clear. It can feel a bit like English sing without specifying a song.

For example:

• 她会唱歌。 = She can sing.
• 她今晚会唱。 = She’ll sing tonight.

The second sentence sounds fine if everyone already knows you are talking about a performance or singing in general.

Yes, they mean essentially the same thing: tonight.

• 今晚 = tonight
• 今天晚上 = this evening / tonight

今晚 is shorter and very common in everyday speech.
今天晚上 is a little fuller and sometimes sounds slightly more explicit.

So these are both natural:

• 她今晚大概会唱。
• 她今天晚上大概会唱。

Yes. In spoken Mandarin:

• 她 = she
• 他 = he
• 它 = it

are all pronounced tā.

The gender difference is visible in writing, but not in pronunciation.

So if you only hear tā, you usually need context to know whether it means he, she, or it.

This is normal in Mandarin.

Sometimes yes, but some positions are more natural than others.

The most natural version here is:

• 她今晚大概会唱。

You may also hear:

• 她大概今晚会唱。

This is possible, but it may slightly shift the focus. It can sound like probably, as for tonight, she’ll sing.

For learners, the safest pattern is:

Subject + time + 大概 + 会 + verb

So this sentence is a great model to follow.

Usually that sounds less natural.

Why? Because 今晚 refers to the future, and 大概 adds uncertainty, so Mandarin often likes a modal such as 会 to show expected future action:

• 她今晚大概会唱。 = natural
• 她今晚大概唱。 = possible in limited contexts, but less standard and less smooth

So in this sentence, 会 helps make the meaning clear: this is something that is expected to happen tonight.

The pinyin and tones are:

• 今 jīn — 1st tone
• 晚 wǎn — 3rd tone
• 大 dà — 4th tone
• 概 gài — 4th tone

So:

• 今晚 = jīnwǎn
• 大概 = dàgài

Full sentence:

• 她 tā
• 今晚 jīnwǎn
• 大概 dàgài
• 会 huì
• 唱 chàng

One thing English speakers often notice is that 唱 chàng has the 4th tone, so it should sound firm and falling.

It sounds most like a guess or prediction, not a firm plan.

That is mainly because of 大概:

• 她今晚会唱。 = She will sing tonight.
• 她今晚大概会唱。 = She will probably sing tonight.

So the speaker is not fully certain. It suggests something like:

• I think she’ll probably sing tonight
• She’s likely to sing tonight

If you wanted to sound more certain, you could remove 大概.