我不知道用英语怎么说？

我不知道

例句

• I don't know whether I can do it, but I'm willing to have a go. 我不知道我是否能做, 但我愿意试一试。
• He says he's got a new bike, but I don't know if that's for real. 他说他已买了一辆新自行车, 但我不知道是否真有其事。
• If the spirit of Caesar could be called up by some spell, I wonder what it would think of the present day. 如果凯撒的灵魂可以用符咒召回的话, 我不知道它对当今世界会有什么看法。
• I don't know what to do with it. 我不知道这件事该怎么处理。
• I am perplexed to know what to do. 我不知道怎么做才好。
• He became a person whose whereabouts is[are] unknown to me. 他的下落我不知道。
• I didn't figure out how to do it. 我不知道该怎么办。
• I don't know how she copes with looking after her family and doing a full-time job. 既要照顾家庭又要工作, 我不知道她是怎样应下来的。
• I don't know how to tackle this problem. 我不知道该如何处理这个问题。
• “I wonder if I shall ever see them again, ”he mused. “我不知道是否还可以再见到他们, ”他沉思自问。