中考英语知识点:时间状语从句 (1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如: It was raining hard when we got to school yesterday. While he was doing his homework, the telephone rang. As he walked along the lake, he sang happily. He had learned a little Chinese before he came to China. After he finished middle school, he went to work in a factory. (2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。例如: I’ll ring you up as soon as I get to New York. I will tell him everything when he comes back. He won’t believe it until he sees it with his own eyes. (3)在带有till或until引导的时间状语从句的主从复合句里,如果主句用肯定式,其含义是“一直到……时”,谓语动词只能用延续性动词。如果主句用否定式,其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。例如: The young man read till the light went out. Let’s wait until the rain stops. We won’t start until Bob comes. Don’t get off until the bus stops. [Practice] I didn’t know he came back I met him in the street. A. since B. when C. until D. after 请填入适当的引导词 I haven’t heard from him _____ he went to America . We found the books two days ____ he had gone away . Do not leave the room _____ you have finished the test. 点击查看更多信息
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