狀語從句是一較大的語法項(xiàng)目，也是近幾年高考題中常見的一個(gè)重要試點(diǎn)。整理了時(shí)間狀語從句中when, while, as的區(qū)別，希望能幫助到你~更多相關(guān)訊息請(qǐng)關(guān)注！
1)when引導(dǎo)從句時(shí)，主從句的動(dòng)作有先有后，也可以同時(shí)進(jìn)行,從句的動(dòng)作可以是持續(xù)性的，也可以是短暫的。
如：
When I got to the airport, the plane had already taken off. （主先從后）（短暫性）
When I lived there, I used to go to the seaside on Sundays. (同時(shí)) （持續(xù)性）
When the movie ended, the people went back. （從先主后）
2)while側(cè)重主從句動(dòng)作的對(duì)比，且從句的動(dòng)詞必須是持續(xù)性的。
如：
While we were chatting she was looking at the time table on the wall．
3)as引導(dǎo)從句時(shí)側(cè)重主從句動(dòng)作同時(shí)或幾乎同時(shí)進(jìn)行，從句的動(dòng)作可以是持續(xù)性的，也可以是短暫的。
如：
Sometimes I watch TV as I am having breakfast．
4）when和while還可以是并列連詞，意思分別是“就在這時(shí)”，“然而”。
如：
I was having a rest on the sofa when the telephone rang．
They were surprised that a child should work out the problem while they couldn’t .
注：并列連詞when常用與以下句型中：
①…was/were doing…when…（正在做…突然）
②…was/were about to do…when…（剛要做…突然）
③…was/were on the point of doing…when…(剛要做…突然)
④…h(huán)ad just done…when….(剛一…就)
⑤Hardly/Scarcely had…done…when…(剛一…就)
好了，以上就是關(guān)于時(shí)間狀語中when, while, as區(qū)別的介紹，還請(qǐng)大家在平時(shí)勤加練習(xí)。