Module 4 Grammar Time adverbial clause时间状语从句课件-2021-2022学年高中英语外研版选修七

Grammar Review of adverbial clauses of time ①He entered the room__________the meeting was going on. ② _______she comes, I shall tell her to wait for you. ③They arrived ____________ we were having dinner. ④______Tony spoke aggressively, Mary listened patiently. ⑤____ time passes, the trade war is becoming worse. 1.when／while／as的用法: while/when/as while/when/as When While As （随着） （一段时间，延续） （指时间点，非延续，不能用while） （一段时间，延续） （同时发生，对比） Point1: 用　法 when 从句谓语用延续性动词和非延续性动词均可，主、从句谓语表示的动作可同时或先后发生 while 从句谓语用延续性动词 表示两个延续性动作同时发生且具有对比意味，常与进行时连用 as 强调主、从句动作同时发生 表示“随着”之意 ①He was about to leave when someone knocked at the door. ______________________________________________ ②Mary was speaking when Tony broke in impolitely! ______________________________________________ ③We had just finished the Party on the school playground when it began to rain heavily. ______________________________________________ be about to do… be on the point of doing... when… be doing… had (just) done... 他刚要走忽然有人敲门 Mary在发言时Tony突然插话！ 我们在学校操场上的活动刚结束突然就下起了大雨 2.before, since引导时间状语从句的用法: ①We must leave our dormitory before the dormitory teachers close the gate at 7:15 在寝室老师在7点15分关门前，我们必须离开寝室。 ②Tony broke in before Mary could finish her words. Mary还来不及说完Tony就插嘴了。 ③Study English hard before it is too late! 趁还不是太晚，努力学习英语吧。 ④Cath hasn’t phoned since she went to Berlin. Cath自从去了柏林还没有打来过电话。 Point2： before的基本意思是“在…之前”但可灵活翻译为 “还来不及…就…”，“趁…时”； since则表示“从…以后；自…以来” 1. Pessimistically, it will be a long time before China makes a trade deal with America. 2. Optimistically, it won't be a long time before China makes a trade deal with America. 3. It wasn't long before he left the country. 4. It was some time before I realized the truth. 5. It is/has been many years since the trade problem arose between China and America. It will be +段时间+before.. 要过...才... It won‘t be +段时间+before… 过不了..就.. It is/was+时间段+before… 过了...才.