例句：
1、She gets very upset if I exclude her from anything
要是有什么事情我不让她参加，她会非常难过。
2、He asked if I had left with you, and I said no
他问我是否和你一块儿离开的，我说不是。
3、Sometimes, that standard is quite difficult, if not impossible, to achieve
有时即便有可能达到那个标准，那也是非常困难。
4、If I could just make another small point about the weightlifters in the Olympics
请允许我就有关奥运会举重运动员的问题再补充一点。
5、I wonder if you'd be kind enough to give us some information, please?
请问您能不能给我们提供一些信息？