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- Teenage Pregnancy: How do I Know if I'm Pregnant? 如何知道是否已怀孕?
- I'm hanged if I know (ie I don't know at all) what to do. 我根本不知道该怎样办。
- I knew if I kept at it I should succeed. 我知道如果我坚持下去就会成功。
- If I know her number, just I can call up she. 要是我知道她的号码，我就能给她打电话。
- If I know his name, I would tell you. 如果我知道他的名字，我就会告诉你了。
- I'll try if I know all the things I used to know. 如果我知道以前了解的我会试试。
- If I knew his address, I could write to him. 如果我知道他的住址，我会写信给他。
- i'm...est if I know. 我根本不知道。
- If I know her number I could ring her up. 如果我知道她的号码，我可能给她打电话。
- If I know her number,just I can call up she. 要是我知道她的号码，我就能给她打电话。
- If I know his name,I will tell you. 如果我知道他的名字,我会告诉你了。
- I'm hanged if I know what to do. 我根本不知道该怎样办.
- How do I know if I am winning in my auction? 如何知道自己在拍卖中是否领先?
- How do I know if I have registered successfully? 如何知道自己已注册成功?
- If I know her, she's making the best of it. 如果我没有认错她的话,她知道忍让。
- How will I know if I have to pay inheritance tax? 我怎么知道我是否必须缴遗产税?
- If I knew English, I should be able to read these English books. 假如我懂英语，我就能读这些英语书了。
- He makes me feel as if i know northing. 他让我觉得自己好象什么也不懂。
- I know I can achieve success if I keep on trying. 我知道,如果我不断尝试,我获得成功的。
- I'm blest if I know! ie I don't know at all. 我要是知道就好了（我一点也不知道）。
