不得不

bù dé bù

have no choice or option but to, cannot but, have to, can't help it, can't avoid

你不觉得冷吗

nǐ bù jué de lěng ma

You don't feel cold?

前年的考试我考得不好。

qián nián de kǎo shì wǒ kǎo děi bù hǎo。

I did not do well in the exam the year before last.

不行，不能进来

bù xíng， bù néng jìn lái

You can't come in here!

我不记得过去发生了什么事情

wǒ bù jì de guò qù fā shēng le shén me shì qing

I don't remember what happened in the past

不对,球不在车里面

Bùduì, qiú bùzài chē lǐmiàn

No, the ball is not in the car

不好意思，我不知道。

bù hǎo yì si， wǒ bù zhī dào。

Sorry, I do not know.

我不用

wǒ bù yòng

I do not need

不能走

bù néng zǒu

Can't go

不能做

bù néng zuò

Can not do

不能说

bù néng shuō

Can not say