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.

   我一觉得有疑问就发问。

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。

conj.

1. introducing a conditional clause:
   ▸on the condition or supposition that.
   ▸(with past tense) introducing a hypothetical situation.
   ▸every time.
2. despite the possibility that.
   ▸despite being.
3. whether.
4. expressing a polite request or tentative opinion.
5. expressing surprise or regret.

n.