if
连接词 conj.
1.
(表示条件)如果
He will come if you invite him.
如果你请他,他会来的.
2.
(表示虚拟)假如,要是
If I were you,I would never do that.
如果我是你,我决不做那件事.
3.
(表示让步)即使
We'll go even if it rains.
即使下雨我们也要去.
4.
是否
I wonder if she is ill.
不知她是否病了.
5.
(表示因果关系)每一次...的时候(总是会)
If I feel any doubt,I inquire.
我一感到有疑问就随时询问.
名词 n.
1.
条件;设想[C]
There are too many ifs in his offer.
他的提议中条件太多了.