That's unclear.
That's clear. (那很清楚了。)
她到底想干什么?
What's she after?
What's she after? (她到底想干什么?)
I'm not sure. (我不清楚。)
What's her game?
我一点儿都不知道。
I have no idea.
Do you know where my pen is? (你知道我的笔在哪儿吗?)
I have no idea. (我一点儿都不知道。)
I have no clue.
No idea.
It's all Greek to me.
我怎么不知道。
I didn't know that.
John got married last week. (约翰上星期结婚了。)
I didn't know that. (我怎么不知道。)
That's news to me. *习惯用法。
I wasn't aware of that.
不知道。/不太清楚。
I don't know.
Do you know where she's from? (你知道她是从哪儿来的吗?)
I don't know. (不知道。/不太清楚。)
I have no idea.
我不太清楚。
I don't know for sure. *for sure 有“确切地”、“毫无疑问地”的含意。
Do you know the way to my house? (你认识去我家的路吗?)
I don't know for sure. (我不太清楚。)
I don't know for certain.
I'm not absolutely sure.
谁也不知道确切的情况。
No one knows for sure. *这种说法与“who knows?”几乎相同,但因为有了for sure,所以句子含有知道得不确切,但也有各种各样的说法的语感。
我怎么会知道?
How should I know? *用于被问到“自己不可能知道”、“根本不知道”的问题时。根据说话的语气,有时会给人以不理睬对方、冷淡对方的语感。
Is he married? (他结婚了吗?)
How should I know? (我怎么会知道?)
谁能知道?
Who knows? *该句有时让人听起来有些富有哲理。
What is the meaning of life? (什么是人生?)
Who knows? (谁能知道?)
Nobody knows.
No way of knowing.
There's no way of knowing.
It's impossible to find out.