不知道该怎么办

don't know what to do

→ 不
phrase Rare #20,347
don't know what to do Used to express uncertainty about how to deal with a situation. The subject is often omitted and understood from context.
CH: 遇到这种问题,我真的不知道该怎么办。
EN: When I encounter this kind of problem, I really don't know what to do.

不知道该怎么办

I don't know what to do.

那我也不知道该怎么办

Then I don't know what to do either.

— 铁皮鼓 (1979)

我们不知道该怎么办

We don't know what to do.

— RRR:双雄起义 (2022)

不知道该怎么办

I don't know what to do.

— 雨水危机 (2011)

不知道该怎么办

I don't know what to do.

— 充气娃娃之恋 (2007)

不知道该怎么办

I don't know what to do.