I don't know what to make of the new manager.
這位新經(jīng)理,我不知道怎么評(píng)價(jià)他才好。
I don't know what you're on about.
我不懂你在談什么。
I don't know how you can say things like that.
真想不到你怎么會(huì)說出這種話來。
I don't know how she puts up with him.
我不明白她怎么受得了他。
I don't know if I can come but I'll try.
我不知道是否能來,但我盡可能來。