我不知道。
I have no idea.
Meaning
to know; to become aware of
also pr. [zhi1dao5]
Examples
我不知道。
I have no idea.
我不知道。
I don't know.
我不知道應該說什麼才好。
我不知道應該說什麼纔好。
I'm at a loss for words.
我只是不知道應該說什麼而已……
I just don't know what to say.
我不知道我有沒有時間。
I don't know if I have the time.