Word: 不知

不知作者在说什么。

Bùzhī zuòzhě zài shuō shímǒ.

It is not clear what the writer is trying to say.

不知怎么我总是没心情工作。

Bùzhī zěnme wǒ zǒngshì méi xīnqíng gōngzuò.

For some reason or other I cannot bring myself to work.

他好像对此全不知清。

Tā hǎoxiàng duì cǐ quán bùzhī qīng.

He seems like he doesn't understand this at all.

我想帮他，但不知如何。

Wǒ xiǎng bāng tā, dàn bùzhī rúhé.

I'd like to help him, but I don't know how.