while的用法
一、連詞用法
While作為並列連詞,意思為“而,然而”,表前後意義上的對比或轉折。如:
There’s plenty of rain in the southeast,while there's little in the northeast. 東南部雨量充足,而西北部則很少下雨。
Some people waste food while others haven't enough. 有些人浪費糧食,然而有些人卻吃不飽。
二、while引導狀語從句
1、表示某個動作正在進行的同時,另一動作也在進行之中,這時主從句都用進行時態,有對同類的兩個動作進行對比的意味。如:
While I was playing the piano,she was dancing. 我在彈鋼琴,她在跳舞。
While Jim is picking apples,Kate is carrying apples to the truck. 吉姆正在摘蘋果,凱特正在把蘋果搬到卡車上去。
2、表示某個動作正在進行時,又發生了另一動作(該動作用一般過去時)。如:
While I was reading,I fell asleep. 我讀着讀着就睡着了。
While we were swimming in the river,we saw a fish jump out of the water. 我們正在河中游泳時,看見一條魚躍出了水面。
三、其他用法
1、只要(=as long as)
There will be life while there is water and air. 只要有空氣和水,就會有生命。
2、而;然而〔表示對比〕
He is a driver while I'm a teacher. 他是司機,而我是老師。
3、雖然(=although);儘管〔表示讓步〕
While I see what you say,I can't agree with you. 雖然我能理解你説的話,但是我不能同意你。
4、用作名詞,表示“一會兒或一段時間”,常與a,the或this等連用。如:
Just wait a while and then I will help you. 等一下,我會來幫你的。
Where have you been all this while? 這一陣子你一直都在哪兒?