高考英語(yǔ)狀語(yǔ)從句學(xué)案：whenaswhile的區(qū)別(核心考點(diǎn))

1、.高考英語(yǔ)狀語(yǔ)從句when,as,while的區(qū)別核心考點(diǎn)when,as,while的區(qū)別1.He fell asleep when while, as he was reading. 他看書(shū)時(shí)睡著了。2.While youre there, can you get me some stamps?3.I kept silent while he was writing. 在他寫(xiě)的時(shí)候，我默不作聲。4.She sang as she went along. 她邊走邊唱。5.It was raining hard when as we arrived. 我們

2、到達(dá)時(shí)正下著大雨。6.I thought of it just when as you opened your mouth. 就在你要說(shuō)的時(shí)候，我也想到了。7.Things are getting better and better as time goes on. 隨著時(shí)間的推移，情況越來(lái)越好。8.As it grew darker, it became colder. 天色越晚，天氣越冷。9.He smiles when you praise him. 你夸獎(jiǎng)他時(shí)他總是笑笑。10.I will go home when he comes back.&

3、#160;他回來(lái)時(shí)，我就回家去。11.We were about to start when it began to rain. 我們正要出發(fā)，這時(shí)天開(kāi)場(chǎng)下雨了。12.He likes coffee, while she likes tea. 他喜歡咖啡，而她卻喜歡茶。13.As When a boy, he lived in Japan. 他小時(shí)候在日本。14.When While in trouble, ask her for help. 遇到費(fèi)事的時(shí)候你就去找她幫助?！練w納】1. 假設(shè)主句表示的是一個(gè)短暫性動(dòng)作，從句表示的是一個(gè)持續(xù)性動(dòng)作

4、，三者都可用：2.as 用于引出一個(gè)持續(xù)性動(dòng)詞表示“在期間時(shí)，其謂語(yǔ)通常只能是那些含有動(dòng)作action和開(kāi)展development 意味的動(dòng)詞，一般不能是那些不用于進(jìn)展時(shí)態(tài)的動(dòng)詞如 be, seem, love, want, agree, see, know, have 等，所以句中的 while 不能換為 as.3.假設(shè)主、從句表示兩個(gè)同時(shí)進(jìn)展的持續(xù)性動(dòng)作，且強(qiáng)調(diào)主句表示的動(dòng)作延續(xù)到從句所指的整個(gè)時(shí)間，通常要用 while：4.假設(shè)主從句表示的兩個(gè)同時(shí)進(jìn)展的動(dòng)作含有“一邊一邊之意思，通常用 as：5.假

5、設(shè)從句是一個(gè)短暫性動(dòng)作，主句是一個(gè)持續(xù)性動(dòng)作，可用 as / when 但不用 while：6.假設(shè)主從句表示的是兩個(gè)同時(shí)或幾乎同時(shí)發(fā)生的短暫性動(dòng)作，用 as / when：7.7.8句假設(shè)要表示兩個(gè)正在開(kāi)展變化的情況，相當(dāng)于漢語(yǔ)的“隨著，一般用 as：8.表示“每當(dāng)?shù)臅r(shí)候暗示一種規(guī)律性，一般要用 when：9.假設(shè)主從句所表示的動(dòng)作不是同時(shí)發(fā)生，而是有先后順序時(shí)，一般要用 when：10.11.12句when 可用作并列連詞，表示“這時(shí)突然；while 也可以用作并列連詞，表示“而、“卻表示比照；但&#

6、160;as 那么沒(méi)有類似用法：11.as 和 when 后均可直接跟一個(gè)名詞，構(gòu)成省略句，但 while 一般不這樣用：13.when 和 while 后可接如今分詞、介詞短語(yǔ)、形容詞等構(gòu)成省略句，但 as 一般不這樣用：when, as, while的區(qū)別一樣點(diǎn)：表示主句的動(dòng)作發(fā)生在從句的較長(zhǎng)動(dòng)作過(guò)程中，when,while ,as均可使用。        從句中為be動(dòng)詞時(shí)，多用when和while。

7、議論兩個(gè)同時(shí)進(jìn)展的長(zhǎng)動(dòng)作可        用while；議論兩個(gè)平行動(dòng)作或兩中狀態(tài)變化多用as。       as, when 引導(dǎo)短暫性動(dòng)作的動(dòng)詞。Just as / Just when/ When I stopped my car, a man came up to me.不同點(diǎn)：        1、when可指時(shí)間點(diǎn)，又可指時(shí)間段，從句中可用延續(xù)行動(dòng)詞，也可用非

8、延續(xù)行動(dòng)詞。       當(dāng)從句的動(dòng)作發(fā)生于主句動(dòng)作之前，只能用when 引導(dǎo)這個(gè)從句，不可用as或 while。When you have finished your work, you may have a rest.        2、while總是指一個(gè)時(shí)間段，從句中必須用延續(xù)性動(dòng)詞。        3、as多用于平行構(gòu)造。表示兩個(gè)動(dòng)作同時(shí)發(fā)生：&#

9、160; 1、一個(gè)主語(yǔ)同時(shí)進(jìn)展兩個(gè)動(dòng)作；He looked behind from time to time as he went forward.             2、一種狀態(tài)隨另一種狀態(tài)的變化而變化。            As

10、 children get older, they become more and more interested in the things around them.          從句表示"隨時(shí)間推移"連詞只能用as，不用when 或while。  As the day went on, the weather

11、 got worse.  日子一天天過(guò)去，天氣越變?cè)綁?。while /as / when假如主句表示的是短暫的動(dòng)作，而從句表示的是一段時(shí)間，三者可通用。   I met her when / while / as I was walking along the river.as和when可與終止性動(dòng)詞連用，while只能與延續(xù)性動(dòng)詞連用。   I saw her as / when she was getting off the bus.as強(qiáng)調(diào)主句與從句表示的動(dòng)作同時(shí)發(fā)生，while強(qiáng)調(diào)主句表示的動(dòng)作延續(xù)于while所指的整個(gè)時(shí)間。

12、試比較：She sang while she went along. 她走路時(shí)不停地唱。She sang as she went along. 她邊走邊唱。when僅指時(shí)間，無(wú)其他含義；as有“隨著之意；while有“然而、“趁著之意?！颈日沼?xùn)練】1.I was walking along the river _ I heard a cry for help.   A.while  B.since  C.when  D.as 2._I admit his good points I can see his

13、 bad ones.   A.when B.as C.while D.before 3.I had just started back for the house to change my clothes _ I heard the voices. A. as        B.for      C. while      D. when4. I had not been reading for half an hour _ I heard steps outside.  A. while  B. as  C. when  D. since5. She stopped _ she might have succeeded next time.  A. when  B. as &