IF(英文单词)

单词资料

发音

英 [ɪf] 美 [ɪf]

释义

• conj. （表条件）如果；即使；是否；（表假设）假如

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. (表示因果关係)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。

• n. 条件；构想

There are too many ifs in his offer.他的提议中条件太多了。

缩写

IF=i.f.if.缩写词 abbr.1. =information feedback 信息回馈2. =interferon3. =intermediate frequency 中频i.f.缩写词 abbr.=intermediate frequency 中频

扩展知识

1. if和whether在宾语从句中，都表“是否”，可换用，if更口语化，whether正式些。当有or not时， 一般用whether，而不用if。He wants to know if/whether you can help him.She wonders whether you'll go or not.2. if可引起条件状语从句，whether不用于状语从句。If you work hard, you'll succeed.If I were you , I would do it in another way.3. whether可引起主语从句，表语从句，if不能用于这两种情况。Whether you can finish it in time or not depends on yourself.The question is whether they'll help you.4. if在名词性从句中只能引导动词后的宾语，whether可通用。