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omework while you’re watching TV. 你不能一邊看電視一邊做家庭作業(yè)。 ?。ㄈ?、另外,when和while的區(qū)別還在于:while引導(dǎo)的時間狀語從句多用進(jìn)行時態(tài),而when引導(dǎo)的時間狀語從句多用一般時態(tài)?! ±纾? While they were talking , the bell rang. 正在他們談話的時候,上課鈴響了。 I was doing my homework when my mother came back home yesterday evening. 昨天晚上媽媽回家的時候,我正在做家庭作 注意: 1) 如主句謂語動詞表示的是短暫動作,從句時間狀語指一段時間,when while as 三者可通用?! eter came in while /as I was watching ?! was watching TV when Peter came in. 當(dāng)Peter進(jìn)來時我正在看電視?! ?) as 和 when 可與非延續(xù)性動詞連用,而 while 只能與延續(xù)性動詞連用?! ±纾篐e came in when/ as I was going to ,他進(jìn)來了。 3) as 和 while可用來指一段時間,但 as 強(qiáng)調(diào)主句與從句表示的動作同時發(fā)生,while強(qiáng)調(diào)主句表示的動作是在 while 從句的動作延續(xù)中發(fā)生?! s my mother sang those old songs, tears ran down her cheeks. 當(dāng)我媽媽唱起那些老歌時,眼淚順著她的臉頰流了下來?! came in while he was reading an interesting book in his room.