2017届高考英语大一轮复习专题课件：专题9 状语从句和并列连词（全国通用）_高考复习指南

2017届高考英语大一轮复习专题课件：专题9 状语从句和并列连词（全国通用）

　　(1)连词before表示“还未……就……”，“不到……就……”，“……才……”，“趁还没来得及……”。

　　Before they reached the station, the train had gone. 他们(还没)到达火车站前，火车已经开走了。 We hadn’t run a mile before he felt tired. 我们跑了还不到一英里他就累了。 Please write it down before you forget it. 趁你现在没忘把它记下来。 (2)before的句型：It will be＋时间段＋ before从句，表示“多久之后才……”。 It will be half a year before I come back. 半年后我才回来。 It won’t be long before we meet again. 不久后我们将再见面。 (3)since的句型： It is/has been＋时间段＋ since从句。若从句谓语为非延续性动词，表示“自从……有多久”；若从句的谓语为延续性动词，表示“自从结束/完成……起有多久”。 It is three years since the war broke out. 战争爆发以来，有三年了。 It is three years since he lived here. 他不在这儿住已经有三年了。 5.every time, each time, next time, the first time, any time, all the time的用法

　　这些短语用来引导时间状语从句，表示“每当……”，“每次……；下次……”等。 Every time I meet her I always forget her name. 每次我见到她时，我总忘了她的名字。 Next time you come, do remember to bring your son here. 下次你来时，记住把你的儿子带来。 You are welcome to come back any time you want to. 你想回来随时可以回来。 1.while和when都可引起时间状语从句，但是while不能与短暂性动作连用。while引导的动作必须是持续性的。当我进来的时侯，他在和别人说话。【误】While I came in, he was talking with others. 【正】When I came in, he was talking with others. 误点：____________________________________ 2.状语从句三要点，时间、原因和条件；从句如果表时间，after，before，when常用；状语从句表原因，because一马来当先；状语从句表条件，if前面来引导；主句通常前面走，从句紧紧跟在后。从句如在主句前，从句之后加逗点。 1.用when，while或as填空 ①________I was young, I was sick all the time.