單詞資料
發音
英 [ɪf] 美 [ɪf]
釋義
•conj. (表條件)如果;即使;是否;(表假設)假如
1. (表示條件)如果
He will come if you invite him.
如果你請他,他會來的。
2. (表示虛擬)假如,要是
If I were you, I would never do that.
如果我是你,我決不做那件事。
3. (表示讓步)即使
We'll go even if it rains.
即使下雨我們也要去。
4. 是否
I wonder if she is ill.
不知她是否病了。
5. (表示因果關係)每一次...的時候(總是會)
If I feel any doubt, I inquire.
我一感到有疑問就隨時詢問。
•n. 條件;構想
There are too many ifs in his offer.
他的提議中條件太多了。
縮寫
IF=i.f.
if.
縮寫詞 abbr.
1. =information feedback 信息回饋
2. =interferon
3. =intermediate frequency 中頻
i.f.
縮寫詞 abbr.
=intermediate frequency 中頻
擴展知識
1. if和whether在賓語從句中,都表“是否”,可換用,if更口語化,whether正式些。
當有or not時, 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可引起條件狀語從句,whether不用於狀語從句。
If you work hard, you'll succeed.
If I were you , I would do it in another way.
3. whether可引起主語從句,表語從句,if不能用於這兩種情況。
Whether you can finish it in time or not depends on yourself.
The question is whether they'll help you.
4. if在名詞性從句中只能引導動詞後的賓語,whether可通用。