來源:網(wǎng)絡(luò)資源 2022-09-13 14:28:05
時(shí)間狀語從句種類
1、引導(dǎo)的從句表示主從句的動(dòng)作同時(shí)發(fā)生,或從句的動(dòng)作在主句之前。when引導(dǎo)的從句的謂語動(dòng)詞可以是延續(xù)性的動(dòng)詞,又可以是瞬時(shí)動(dòng)詞。例如:
When she came in, I stopped eating.她進(jìn)來時(shí),我停止吃飯。(瞬時(shí)動(dòng)詞)
When I lived in the countryside, I used to carry some water for him.當(dāng)我住在農(nóng)村時(shí),我常常為他擔(dān)水。(延續(xù)性的動(dòng)詞)
We were about to leave when he came in.我們就要離開,就在那時(shí)他進(jìn)來了。
2、While引導(dǎo)的從句的謂語動(dòng)作必須是延續(xù)性的,并強(qiáng)調(diào)主句和從句的動(dòng)作同時(shí)發(fā)生(或者相對(duì)應(yīng))。并且while有時(shí)還可以表示對(duì)比。例 如:While my wife was reading the newspaper, I was watching TV. (was reading是延續(xù)性的動(dòng)詞,was reading和was watching同時(shí)發(fā)生)I like playing football while you like playing basketball.我喜歡踢足球,而你喜歡打籃球。(對(duì)比)
3、As表示“一邊……一邊”,as引導(dǎo)的動(dòng)作是延續(xù)性的動(dòng)作,一般用于主句和從句動(dòng)作同時(shí)發(fā)生;as也可以強(qiáng)調(diào)“一先一后。例如:We always sing as we walk.我們總是邊走邊唱。(as表示”一邊……一邊“)As we was going out, it began to snow.當(dāng)我們出門時(shí),開始下雪了。(as強(qiáng)調(diào)句中兩個(gè)動(dòng)作緊接著先后發(fā)生,而不強(qiáng)調(diào)開始下雪的特定時(shí)間)
4、由before和after引導(dǎo)的時(shí)間狀語從句,表示兩個(gè)動(dòng)作一前一后發(fā)生。
例如:It will be four days before they come back. 他們要過四天才能回來。
After you think it over, please let me know what you decide.你仔細(xì)考慮過以后,告訴我你是怎樣決定的。
5、由till或until引導(dǎo)的時(shí)間狀語從句。till和until一般情況下兩者可以互換,但是在強(qiáng)調(diào)句型中多用until.并且要注意的 是:如果主句中的謂語動(dòng)詞是瞬時(shí)動(dòng)詞時(shí),必須用否定形式;如果主句中的謂語動(dòng)詞是延續(xù)性動(dòng)詞時(shí),用肯定或否定形式都可以,但表達(dá)的意思不同。till不可 以用在句首,而until可以放在句首。例如:
I didn't go to bed until(till)my father came back.直到我父親回來我才上床睡覺。
I worked until he came back.我工作到他回來為止。
6、由since引導(dǎo)的時(shí)間狀語從句表示“自從……以來”。
I have been in Beijing since you left. 自從你離開以來,我一直在北京了。
7、由as soon as引導(dǎo)的時(shí)間狀語從句表示“一……就”。例如:
As soon as I reach Canada, I will ring you up. 我一到加拿大,就給你來電話。
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