?狀語從句在四、六級(jí)、研究生入學(xué)考試以及各類應(yīng)試中是一項(xiàng)比較重要的測(cè)試內(nèi)容。引導(dǎo)狀語從句的是一些連詞,它們的位置比較靈活,可以置于句首,也可以置于句末?,F(xiàn)在和小編一起來看看時(shí)間狀語從句的引導(dǎo)詞吧!

(1) when引導(dǎo)的時(shí)間狀語從句
①.when引導(dǎo)的時(shí)間狀語從句,其動(dòng)詞既可以是延續(xù)性動(dòng)作的動(dòng)詞,也可以是瞬間性動(dòng)作的動(dòng)詞,而且可以表示主句的動(dòng)作和從句的動(dòng)作同時(shí)發(fā)生,或者從句的動(dòng)作發(fā)生在主句的動(dòng)作之前。如:
when you apply for a job, you must present your credentials.
當(dāng)你申請(qǐng)工作時(shí),你必須遞交你的有關(guān)證件。(同時(shí))
② when還可表示just then(正在那時(shí),突然)的意思,此時(shí)其所引導(dǎo)的從句只放在主句之后。如:
we were about to start when it began to rain.
我們正要?jiǎng)由?,突然天下起雨來?/p>

(2) as引導(dǎo)的時(shí)間狀語從句
as引導(dǎo)的時(shí)間狀語從句其動(dòng)詞的動(dòng)作是延續(xù)性的,而且側(cè)重表示主句和從句的動(dòng)作并相發(fā)生:
We were having breakfast as she was combing her hair.
她梳頭時(shí)我們?cè)诔栽顼垺?/p>

(3) while引導(dǎo)的時(shí)間狀語從句
while表示“在某一段時(shí)間里”或“在……期間”,其所引導(dǎo)的從句的動(dòng)作是延續(xù)性的,并側(cè)重表示和主句的動(dòng)作同時(shí)發(fā)生。如:
When the teacher paraphrased the text in English, the students listened attentively and took notes.
當(dāng)老師用英語解釋課文時(shí),學(xué)生們聚精會(huì)神地聽并做著筆記。
I can learn while I work.
我可以邊工作邊學(xué)習(xí)。

(4) before引導(dǎo)的時(shí)間狀語從句
① before“在……之前”
I have finished my dissertation before my supervisor went abroad.
在我的導(dǎo)師出國(guó)之前,我已完成了我的學(xué)位論文。
② before“……之后才”
It may be many years before we meet again.
可能要過許多年我們才能再見了。

(5) as soon as/once/directly/the instant等引導(dǎo)的時(shí)間狀語從句
as soon as 是最常見的表示“一……就”的從屬連詞,其他連詞還有once,directly,immediately,instantly,the instant (that),the minute(that) ,the moment(that)等,它們通常都可與as soon as換用。如:
As soon as we got home, the telephone rang.
我們一到家,電話就響了。
I recognized her immediately I saw her.
我一看見她就認(rèn)出她來了。
Directly the teacher came in everyone was quiet.
老師一進(jìn)來,大家就靜了下來。

(6) hardly...when/no sooner...than引導(dǎo)的時(shí)間狀語從句
關(guān)聯(lián)從屬連詞hardly/barely/scarcely...when和no sooner...than的意思是“剛……就”,它們所引導(dǎo)的從句中的謂語動(dòng)詞通常為過去完成時(shí)。如:
He had no sooner (no sooner had he)arrived home than he was asked to start on another journey.
他剛一到家,就又要他出另一次差。
No sooner had the words been spoken than he realized that he should have remained silent.
這些話剛一出口,他就意識(shí)到自己應(yīng)該保持沉默。

(7) since引導(dǎo)的時(shí)間狀語從句
在含有since引導(dǎo)的時(shí)間狀語從句的復(fù)合句中,從句的謂語動(dòng)詞通常為一般過去時(shí),主句的謂語動(dòng)詞通常為現(xiàn)在完成時(shí)、過去完成時(shí)和一般現(xiàn)在時(shí): We’ve never met since we graduated from the college.
大學(xué)畢業(yè)后我們就再?zèng)]見過面。
Great changes have taken place since you left.
你走了以后,這里發(fā)生了巨大變化。

(8) till/until引導(dǎo)的時(shí)間狀語從句 till和until同義,作“直到……時(shí)(為止)”解,till多用于非正式文體,until多用于句首。如:
Donald will remain in college until(till) he finishes his Ph.D course.
唐納德將留在學(xué)校直到完成他的博士學(xué)位課程。
I won’t go with you until(till) I finished my homework.
等我做完作業(yè)我才和你一起去。

(9) whenever/each time/every time引導(dǎo)的時(shí)間狀語從句
whenever在引導(dǎo)時(shí)間狀語從句時(shí)作“每當(dāng);每次”解,each time和every time與whenever同義,通??梢耘c它換用。如:
The roof leaks whenever it rains.
每逢下雨屋頂就漏雨。
Whenever certain chemicals are mixed together,heat is produced.
某些化學(xué)物質(zhì)被混到一起時(shí),就會(huì)產(chǎn)生熱。
Whenever/ Every time/ Each time I met her, she was studying.
我每次看見她時(shí),她總是在學(xué)習(xí)。