when引導的時間狀語從句講解?一、when可以和延續性動詞連用,也可以和短暫性動詞連用;而while和as隻能和延續性動詞連用,下面我們就來說一說關于when引導的時間狀語從句講解?我們一起去了解并探讨一下這個問題吧!
when引導的時間狀語從句講解
when,While,as顯然都可以引導時間狀語從句,但用法區别非常大。一、when可以和延續性動詞連用,也可以和短暫性動詞連用;而while和as隻能和延續性動詞連用。
① Why do you want a new job when you've got such a good one already?(get為短暫性動詞)你已經找到如此好的工作,為何還想再找新的?
②Sorry,I was out when you called me.(call為短暫性動詞)對不起,你打電話時我剛好外出了。
③Strike while the iron is hot.(is為延續性動詞,表示一種持續的狀态)趁熱打鐵。
④ The students took notes as they listened.(listen為延續性動詞)學生們邊聽課邊做筆記。
二、when從句的謂語動詞可以在主句謂語動作之前、之後或同時發生;while和as從句的謂語動作必須是和主句謂語動作同時發生。
1.從句動作在主句動作前發生,隻用 when。
①When he had finished his homework,he took a short rest.(finished先發生)當他完成作業後,他休息了一會兒。
②When I got to the airport,the guests had left.(got to後發生)當我趕到飛機場時,客人們已經離開了。
2.從句動作和主句動作同時發生,且從句動作為延續性動詞時,when,while,as都可使用。
①When /While /As we were dancing,a stranger came in.(dance為延續性動詞)當我們跳舞時,一位陌生人走了進來。
②When /While /As she was making a phonecall,I was writing a letter.(make為延續性動詞)當她在打電話時,我正在寫信。
3.當主句、從句動作同時進行,從句動作的時間概念淡化,而主要表示主句動作發生的背景或條件時,隻能用 as。這時,as常表示“随着……”;“一邊……,一邊……”之意。
① As the time went on,the weather got worse.(as表示“随着……”之意)
② The atmosphere gets thinner and thinner as the height increases.
随着高度的增加,大氣越來越稀薄。
③As years go by,China is getting stronger and richer.
随着時間一年一年過去,中國變得越來越富強了。
④The little girls sang as they went.
例題分析:
That day, I was doing my homework ___ my younger brother was watching TV.
Suddenly the doorbell rang.
A.when B.while
C.before D.after
when 和while都可以表示“兩個動作同時發生”的含義, 此時它們的不同之處在于while 有表示“對比”的含義, 如題目中一人在做作業,一人在看電視,強調兩人做不同的事情,有對比的含義,選擇B選項
when和while都可以用在多種行為或情況同時發生。具體情況有下面四種:
1.我們經常用when和while引導時間狀語從句引出一個大的背景,而在這個背景之下發生發生了主句所描述的行為。
i.e. Somebody broke into the house when/while they were playing cards.
他們在打牌的時候有人闖進了房子。
2.當表示兩個長時行為與情況同時發生時,用while而不用when.
i.e. While you were reading the paper, I was working.你在讀報時,我在工作。
3.when引導的從句表示在主句中描述的大背景下發生了另一行為。這時不能用while.
i.e. I was asleep in my chair when Dora rang to say she wasn't coming home.我睡覺的時候,多利給我打電話說她不會回家。
4.當表示年齡或是生命中的一段時間時,用when而不用while.
i.e. When I was a child we lived in London. 我小時候住在倫敦。
,