來(lái)源:網(wǎng)絡(luò)資源 作者:中考網(wǎng)整理 2019-08-19 21:43:04
中考英語(yǔ)知識(shí)點(diǎn):while、when、as的用法區(qū)別
while常表示一個(gè)較長(zhǎng)的動(dòng)作,它引導(dǎo)的從句動(dòng)作與主句的動(dòng)作是同時(shí)發(fā)生的、是平行的;
when可以表示較短的動(dòng)作也可以表示較長(zhǎng)的動(dòng)作,主句和從句的動(dòng)作可以同時(shí)發(fā)生也可以先后發(fā)生;
as與上兩詞同義,可替換while和when, 表示主句和從句的動(dòng)作同時(shí)發(fā)生,常譯為“一邊……一邊……”。
如:Please do not trouble me while I am writing my homework.
I’ll go home when I have finished my job.
They were running quickly across the road when they heard the sound of a truck coming.
As we walked in the dark street, we sang songs and talked loudly.
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