状语从句专题讲解课件-2024届高三英语一轮复习

状语从句专题讲解 什么是状语？ 状语在一个句子中是修饰谓语动词的或者整个句子的。 Ying’er eats Lao Gan Ma chili sauce every day. Ying’er eats Lao Gan Ma chili sauce every day to lose weight. Ying’er eats Lao Gan Ma chili sauce every day so that she can lose weight. 如果状语是由一个句子而非一个词或词组来充当，那么这个小句子就叫做状语从句。 根据状语从句所表示的作用不同，可分为时间状语从句，地点状语从句，原因状语从句，结果状语从句，条件状语从句，让步状语从句，方式状语从句，比较状语从句等。 时间状语从句 当……的时候 when/while/as When+从句，主句（从句与主句的时态可以是一般时，也可以是进行时） While+从句，主句（从句与主句的时态都是进行时） As+从句，主句（从句与主句的时态可以是一般时，也可以是进行时） 特殊用法： 主句（was/were doing ），when +从句（一般过去时） 某人正在做某事，这时突然…… 主句（was/were about to do ），when +从句（一般过去时） 某人正要做某事，这时突然…… Eg: An old man was fishing on the river, when someone was shouting for help. The housewife was about to go out, when the telephone rang. While+从句，主句 尽管 While we live far away, we don’t feel distant. 主句+as +从句 一边……；一边…… 孩子们一边唱歌，一边跑向学校。 Children ran to the school as they sang songs. As+从句，主句 随着…… 【注】一般在考试中，应用：随着经济的发展；随着时间的流逝； 随着年龄变大 Eg: As time goes by, they have lost touch with each other. 随着时间的流逝，他们彼此失去了联系。 As he grows older, he fears death more. 随着渐渐老去，他越发害怕死亡。 在……之前 Before+ 句子 Before +V-ing (介词) 特殊句式： It is/was/will be +时间段+before+从句 过了多久之后…… Eg: It was two days before the result came out. 两天后，结果就出来了。 It will be not long before we see each other again. 在……之后 after + 句子 after +V-ing (介词) 直到 until/till+从句 （主句的谓语动词是持续性动词） 直到……才 not……until…… （主句的谓语动词是短暂性动词） (not 在这里不是表示这个单词，而是表示主句是一个否定句） Eg: She waited until the restaurant was closed. The girl didn’t go to bed until her parents got home. since 自从 1）从句用一般过去时 2）主句用现在完成时 Eg: The professor has been devoted to his research since he heard of this field. By the time 截止到……为止 1）从句用一般过去时，主句用过去完成时(had done)； 2）从句用一般现在时，主句用将来完成时(will have done) Eg: By the time he graduates from the university, he will have lived in this city for 6 years. By the time parents got home, the boy had played games the whole afternoon. 一……就 As soon as +从句（可用于各种时态） the moment = the instant +从句 （用法同as soon as)