wǒ búhuì yǒngyuǎn děng.

Because 不 changes tone before a fourth-tone syllable.

• 不 is normally fourth tone: bù
• 会 is also fourth tone: huì
• When 不 comes before another fourth tone, it changes to second tone: bú

So:

• 不会 → búhuì

This is a very common pronunciation rule in Mandarin.

In this sentence, 不会 most naturally means won’t or am not going to.

The word 会 can mean several things:

• to know how to
  
  • 我会说中文 = I know how to speak Chinese
• can / be able to
• will / be likely to

In 我不会永远等, the meaning is about future intention, so 不会 is understood as:

• won’t
• will not

So the sentence means that the speaker is refusing to keep waiting forever, not that they lack the ability to wait.

Because 永远 acts like an adverb here, and adverbs usually come before the main verb in Mandarin.

The structure is:

• 我 = subject
• 不会 = modal verb
• 永远 = adverb
• 等 = main verb

So the order is:

• Subject + modal + adverb + verb

That gives:

• 我不会永远等

This is very normal Mandarin word order.

No, the meaning changes a lot.

• 我不会永远等 = I won’t wait forever
  
  • I may wait for a while, but not endlessly.
• 我永远不会等 = I will never wait
  
  • I won’t wait at all, ever.

This is an important word-order difference.

So:

• 不会永远等 = not wait forever
• 永远不会等 = never wait

In English, both may look similar, but Mandarin distinguishes them clearly through placement.

Yes. Mandarin can omit the object if it is already understood from context.

So 等 by itself can simply mean:

• wait

If the listener already knows what the speaker is waiting for, there is no need to say it.

For example:

• 我不会永远等 = I won’t wait forever
• 我不会永远等你 = I won’t wait for you forever

Both are grammatical. The second is just more explicit.

Yes, it is understandable and grammatical, but it sounds a little concise and dramatic.

In everyday speech, many speakers might say:

• 我不会一直等下去。 = I’m not going to keep waiting forever.
• 我不会永远等你。 = I won’t wait for you forever.
• 我不可能永远等下去。 = I can’t possibly keep waiting forever.

So 我不会永远等 is fine, but it can sound a bit short, forceful, or written-style unless the context makes the omitted object clear.

Because this sentence is not talking about a completed action. It is a statement about future intention or refusal.

了 is often used for:

• completed action
• change of state
• new situation

But here the speaker is saying something like:

• I will not do this forever
• I am not willing to continue this indefinitely

So no 了 is needed.

If you added 了, the feeling would change and would need a different context.

They are similar, but not identical.

• 永远 = forever, for all time
• 一直 = continuously, all along, non-stop

In this sentence, 永远 emphasizes forever.

So:

• 我不会永远等 = I won’t wait forever
• 我不会一直等下去 = I’m not going to keep waiting continuously / indefinitely

In many everyday situations, 一直 can sound more natural when talking about continuing an action.
永远 often sounds stronger, more emotional, or more absolute.

Often, yes.

The complement 下去 adds the idea of continuing on. So:

• 等 = wait
• 等下去 = keep waiting / continue waiting

That means:

• 我不会永远等 = I won’t wait forever
• 我不会永远等下去 = I won’t keep waiting forever

The version with 下去 can sound more complete in conversation because it makes the idea of ongoing waiting more explicit.

A natural pronunciation is:

• Wǒ búhuì yǒngyuǎn děng.

A few pronunciation notes:

• 我 = third tone
• 不 changes to bú because 会 is fourth tone
• 永远 is pronounced yǒngyuǎn
• 等 is third tone

In natural speech, the sentence usually flows smoothly, with the main stress often falling on 永远 or 等, depending on what the speaker wants to emphasize.