1.When is your next appointment?你下一次预约时间是什么时候?2.When shall I do the shopping ?我什么时候去买东西呢?3.He was a daredevil when young.他年青的时候也是个不怕死的人。4.Nobody was in when we called.我们打电话时家里没人。5.When was the bridge constructed?那座桥是...
1.表示有规律的,都用一般现在时 如:Water turns into steam when we heat it.2.表示将来的.事情,用主将从现(主句将来时,从句一般现在时)如:I will tell him when he comes back.3.表示过去两个有先后的动作,都用过去式 如:When he came back, I told him the news.4.表示一个动...
Mother went shopping when I cleaned the house.I cleaned the house while mother went shopping.用when,while连接,就都是一句话了。附:(一)when,while都有“当……时候”的意思。when既可表示某一点时间,也可以表示某一段时间 。在when引导的时间状语从句中,其谓语动词可以是延续性的,也可以...
1、若主句表示的是一个短暂性的动作,而从句表示的是一个持续性动作时,三者都可用。例如He fell asleep when he was reading.他看书时睡着了。I met him when I was taking a walk in the park.我在公园散步时遇到了他。2、as用于引出一个持续性动词表示在某期间时,其谓语通常只能是那些含有...
例如: 1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。 2、You can't do your homework while you're watching TV. 你不能一边看电视一边做家庭作业。(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导...