【正文】 音樂。re at it.（既然我們著手干了，我想今天就把它干完。ll never save any money while you39。）While a spark of life remains, it is a doctor39。例如：While it was late, he went on working.（雖然很晚了，但他還在繼續(xù)工作。）二、while 用作連詞時(shí)，有以下幾種含義：“當(dāng)……時(shí)候，和……同時(shí)”，引導(dǎo)時(shí)間狀語從句。When [While] in trouble, ask her for 。如： As [When] a boy, he lived in 。七、根據(jù)是否用作并列連詞來區(qū)分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”(表示對(duì)比)；但as則沒有類似用法。I tried to slip the note to him while the teacher wasn’t 。如： When he arrives he’ll tell us all about the ，他會(huì)好好給我們講講那場(chǎng)比賽的情況。四、根據(jù)從句動(dòng)作的規(guī)律性來區(qū)分若暗示一種規(guī)律性，表示“每當(dāng)??的時(shí)候”，英語一般要用when。As time goes by my memory seems to get ，我的記憶力似乎越來越差。如： I caught him just when [as] he was leaving the ，我把他截住了。He jumped to his feet as the boss came 。如：It was raining hard when [as] we 。但是，若主句和從句所表示的兩個(gè)同時(shí)進(jìn)行的動(dòng)作含有“一邊??一邊”之意時(shí)，則習(xí)慣上要用as。B：While you are there，can you get me some stamps？當(dāng)你在郵局時(shí)，能幫我買幾張郵票嗎？“主長(zhǎng)從長(zhǎng)”型：即主句和從句為兩個(gè)同時(shí)進(jìn)行的動(dòng)作或存在的狀態(tài)，且強(qiáng)調(diào)主句動(dòng)作或狀態(tài)延續(xù)到從句所指的整個(gè)時(shí)間，此時(shí)通常要用while。版本三一、根據(jù)從句動(dòng)作的持續(xù)性來區(qū)分“主短從長(zhǎng)”型：即主句是一個(gè)短暫性動(dòng)作，而從句是一個(gè)持續(xù)性動(dòng)作，此時(shí)三者都可用。When he came back，I was doing some ，我在洗衣服。它表示的時(shí)間概念比較廣泛，上述例句中的as或while均可用when代替，因?yàn)閣hen不但可以表示具體的時(shí)間點(diǎn)，而且也可以表示一段時(shí)間。例如：He was watching TV while she was ，他在看電視。（線線重合）The students were talking as the teacher came ，學(xué)生們正在講話。as可表示主句和從句的動(dòng)作同時(shí)發(fā)生或同時(shí)持續(xù)，即“點(diǎn)點(diǎn)重合”“線線重合”；又可表示一個(gè)動(dòng)作發(fā)生在另一個(gè)動(dòng)作的持續(xù)過程中，即“點(diǎn)線重合”，但不能表示兩個(gè)動(dòng)作一前一后發(fā)生。(9)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： As [When] a boy, he lived in 。He smiles when you praise 。(4)若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： I thought of it just when [as] you opened your ，我也想到了。B：While you’re there, can you get me some stamps? 當(dāng)你在郵局時(shí)，能幫我買幾張郵票嗎?(2)若主、從句表示兩個(gè)同時(shí)進(jìn)行的持續(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：Don’t talk while you’re 。3)as 和 while可用來指一段時(shí)間，但 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)作是在 while 從句的動(dòng)作延續(xù)中發(fā)生。例如：Peter came in while /as I was watching 。You can’t do your homework while you’re watching 。Were you writing when the teacher came in?老師進(jìn)來的時(shí)候，你在寫信嗎？When he was a child he was always trying out new 。when/while都可做并列連詞．前者表and at that time,(這時(shí)，突然)，后者表對(duì)比，可譯為”然而”I was going downstairs when the telephone is in blue while Lily is in while后也可加持續(xù)性動(dòng)詞（一）、when，while都有“當(dāng)??時(shí)候”的意思。You can’t do your homework while you’re watching 。Were you writing when the teacher came in?老師進(jìn)來的時(shí)候，你在寫信嗎？When he was a child he was always trying out new 。（一）、when，while都有“當(dāng)??時(shí)候”的意思。while 當(dāng)??時(shí)候while能用when代替。when表示“在那時(shí)”；while表示“而，卻”，表對(duì)照關(guān)系。對(duì)于，填寫when還是while的問題，通常首先看主句和從句中的時(shí)態(tài)，再根據(jù)以上4個(gè)規(guī)律來判斷填寫那個(gè)單詞。如： I thought of it just when you opened your ，我也想到了。若從句是一個(gè)短暫性動(dòng)作，而主句是一個(gè)持續(xù)性動(dòng)作，可以 when 但不用 while。I met him when [while] I was taking a walk in the 。②I had hardly ／scarcely entered my room when the telephone rang．＝Hardly ／Scarcely had I entered my room when the telephone rang．我剛一走進(jìn)房門，電話就響了。①You shall borrow the book when I have finished reading it．在我讀完這本書后，你可以借閱。③As years go by，China is getting stronger and richer．隨著時(shí)間一年一年過去，中國(guó)變得越來越富強(qiáng)了。②When ／While ／As she was making a phonecall，I was writing a letter．（make為延續(xù)性動(dòng)詞）當(dāng)她在打電話時(shí)，我正在寫信。①When he had finished his homework，he took a short rest．（finished先發(fā)生）當(dāng)他完成作業(yè)后，他休息了一會(huì)兒。③Strike while the iron is hot．（is為延續(xù)性動(dòng)詞，表示一種持續(xù)的狀態(tài)）趁熱打鐵。具體你可以參考這一段。③由when引導(dǎo)的時(shí)間狀語從句，主句用過去進(jìn)行時(shí)，從句應(yīng)用一般過去時(shí)；如果從句和主句的動(dòng)作同時(shí)發(fā)生，兩句都用過去進(jìn)行時(shí)的時(shí)候，多用while引導(dǎo)，如： the teacher came in, we were ，則為：While we were talking, the teacher came were singing while we were dancing.④when和while 還可作并列連詞。②when 說明從句的動(dòng)作和主句的動(dòng)作可以是同時(shí)，也可以是先后發(fā)生；while 則強(qiáng)調(diào)主句的動(dòng)作在從句動(dòng)作的發(fā)生的過程中或主從句兩個(gè)動(dòng)作同時(shí)發(fā)生。 is strong while his brother is ，而他弟弟卻很瘦弱。① Why do you want a new job when youve got such a good one already？（get為短暫性動(dòng)詞）你已經(jīng)找到如此好的工作，為何還想再找新的？ ②Sorry，I was out when you called me．（call為短暫性動(dòng)詞）對(duì)不起，你打電話時(shí)我剛好外出了。1．從句動(dòng)作在主句動(dòng)作前發(fā)生，只用 when。①When ／While ／As we were dancing，a stranger came in．（dance為延續(xù)性動(dòng)詞）當(dāng)我們跳舞時(shí)，一位陌生人走了進(jìn)來。① As the time went on，the weather got worse．（as表示“隨著??”之意）② The atmosphere gets thinner and thinner as the height increases．隨著高度的增加，大氣越來越稀薄。4．在將來時(shí)從句中，常用when，且從句須用一般時(shí)代替將來時(shí)。sb．had hardly（＝scarcely）done sth．when．．．＝Hardly ／ Scarcely had sb．done sth．when．．．①I had hardly ／scarcely closed my eyes when someone knocked at the door．＝Hardly ／ Scarcely had I closed my eyes when someone knocked at the door．我剛一閉上眼，就有人在敲門了。如：He fell asleep when [while] he was 。I kept silent while he was ，我默不作聲。若主、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，一般要用 when。如果是過去式，一般是短暫性動(dòng)作。③由when引導(dǎo)的時(shí)間狀語從句，主句用過去進(jìn)行時(shí)，從句應(yīng)用一般過去時(shí)；如果從句和主句的動(dòng)作同時(shí)發(fā)生，兩句都用過去進(jìn)行時(shí)的時(shí)候，多用while引導(dǎo)，如： the teacher came in, we were ，則為：While we were talking, the teacher came were singing while we were dancing.④wh