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while和when的區(qū)別(狀語從句while和when的區(qū)別)

when 與 while用法的區(qū)別是什么?

when 與 while用法的區(qū)別:

while引導(dǎo)的時間狀語從句多用進(jìn)行時態(tài),而when引導(dǎo)的用一般時態(tài)即可。

例如:用while時可以說:While I was seeking a parking lot, the police came over and asked me to show my driving license.(當(dāng)我在找停車場的時候,警察走過來讓我出示駕照。) 用when則要說:When I turned my head, I saw a police coming over.(當(dāng)我回頭的時候,我看到警察朝我走過來。)

while只能表達(dá)“during certain amount of time”(在某段時間內(nèi)),不能表達(dá)某一時間點。而when則既可以表達(dá)一個時間點,又可以表達(dá)一段時間。所以,跟在while后面的動詞必須要是個延續(xù)性動詞,不能是類似:put on、sit down這樣瞬間就結(jié)束的動詞。

例如:While I was wondering what to order for lunch today, Penny suggested pizza.(當(dāng)我還在苦思冥想中午吃什么的時候,Penny提議吃披薩。)

1、I asked him when he'd be back to pick me up.

我問他什么時候回來接我。

2、He could remember a time when he had worked like that himself.

他還能記得自己一度工作起來也是那個樣子。

3、How can I love myself when I look like this?

我這個樣子,怎么能對自己滿意呢?

while

1、They walked on in silence for a while.

他們繼續(xù)默默無語地走了一會兒。

2、All the while the people at the next table watched me eat.

我吃東西的時候鄰桌的人一直在看我。

3、I sat on the settee to unwrap the package while he stood by.

我坐在長椅上打開包裹時他就站在旁邊。一、延續(xù)性動詞延續(xù)性動詞就是指能延續(xù)的動作,可以持續(xù)下去的動作,比如說read,它可以長時間延續(xù),可以一直reading下去。如:live,run,stay,clean,play,hold,watch,teach,read,study,teach,eat,drink,write,dance, sing,smoke二、when和while的區(qū)別與用法1.when 是指某個時間所發(fā)生的事,用于在完成時態(tài)while是指某個時間段所發(fā)生的事,用于進(jìn)行時態(tài)2.①when意為"在……時刻或時期",它可兼指"時間點"與"時間段",所引導(dǎo)的從句的動詞既可以是終止性動詞,也可是持續(xù)性動詞。如: when i got home, he was having supper.我到家時,他正在吃飯。 when i was young, i liked dancing.我年輕時喜歡跳舞。②while只指"時間段",不指"時間點",從句的動詞只限于持續(xù)性動詞。如: while i slept, a thief broke in.在我睡覺時,盜賊闖了進(jìn)來。③when從句動詞為終止性動詞時,不能由while替換。如: when he came yesterday, we were playing basketball.昨天他來時,我們正在打籃球。④當(dāng)從句的謂語是表動作的延續(xù)性動詞時,when, while才有可能互相替代。如: while / when we were still laughing, the teacher came in.正當(dāng)我們?nèi)栽诖舐曟倚r,老師進(jìn)來了。⑤當(dāng)從句的謂語動詞是終止性動詞,而且主句的謂語動詞也是終止性動詞時,when可和as通用,而且用as比用when在時間上更為緊湊,有"正當(dāng)這時"的含義。如: he came just as (or when) i reached the door.我剛到門那兒,他就來了。⑥從句的謂語動詞如表示狀態(tài)時,通常用while。如: we must strike while the iron is hot.我們應(yīng)該趁熱打鐵。⑦while和when都可以用作并列連詞。 mike is tall while his brother is short.邁克的個子很高,然而他弟弟很矮。 mary was on her way home when two big boys stopped her.瑪麗正走在回家的路上,這時兩個大個子男孩攔住她。1,when是at or during the time that, 既指時間點,也可指一段時間,while是during the time that,只指一段時間,因此when引導(dǎo)的時間狀語從句中的動詞可以是終止性動詞,也可以是延續(xù)性動詞,而while從句中的動詞必須是延續(xù)性動詞。

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