if

[if]

conj.是否, 如果, 即使, 每当
n.条件, 设想

例句与用法：

She glares at me if I go near her desk.

我一走近她的办公桌，她就瞪我。

Do you know if he's married?

他结婚没结婚，你知道吗？

I'm not sure whether to resign or stay on.

我拿不准主意是辞职还是留任。

I wonder if I should wear a hat.

我不知道该不该戴帽子。

Even if you saw him pick up the money, you can't be sure he stole it.

就算你看见是他拾起的钱，你也不能肯定钱就是他偷的。

If he wins and it's a big if he'll be the first Englishman to win for twenty years.

假使他赢了－－是否能赢还是一大疑问－－他将是二十年来第一个获胜的英国人。

Listen to the tune see if you can remember the words.

请听这曲子－－看你能不能想得起歌词来。

If weather permit, we will go to the park tomorrow.

如果天气好的话，明天我们去公园。

详细释义：

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.

条件; 设想[C]

There are too many ifs in his offer.

他的提议中条件太多了。

短语词组：

if only

1. 只要

If only it clears up , we'll go.

只要天一放晴, 我们就去。

2. 但愿

If only he arrives in time.

但愿他能及时赶到。