连词
1. We'll go even if it rains.
即使下雨我们也要去。
2. She asked if that was enough.
她问那是否够了。
3. I wonder if she is ill.
不知她是否病了。
4. if
4. If I feel any doubt, I inquire.
我一感到有疑问就随时询问。
名词
1. Your argument seems to have too many ifs.
你的论据似乎假设太多了一些。