《青少版新概念3B 24》.pptVIP

按要求转换下列句型。 1. We were having a PE class at four yesterday afternoon.（改为否定句） We ______ ______ a PE class at four yesterday afternoon. 2. Kate was reviewing her lessons at eight last night.（改为一般疑问句，并做肯、否定回答） ________ Kate _______her lessons at eight last night? ________ , she ________. ??? ???________ , she _______ . 用所给动词的正确形式填空： Do you know what they _____ (do) this time yesterday? They _____ (have) supper when we _____ (go) into the room. It ______ (rain) from 7 to 9 last night. When she ______ (arrive) I _______ (telephone) Harry. What _____ you ______ (do) yesterday at 7 pm? When I ______ (go) downstairs (楼下), they _______ (eat) breakfast. When we arrived, she ______ (make) some fresh coffee. I broke a glass, while I _______ (cook) the dinner. 1.时间状语从句 when和while： while引导的时间状语从句多用进行时态，而when引导的时间状语从句多用一般时态。??如：?1While?they?were?talking?,?the?bell?rang.?? 正在他们谈话的时候，上课铃响了。 2I?was?doing?my?homework?when?my?mother?came?back?home?yesterday?evening.? 昨天晚上妈妈回家的时候，我正在做家庭作业 ? 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 引导的时间状语从句多用一般时态。 ? ? 例如： ? ? 1 、 While?they?were?talking?,?the?bell?rang.? ? 正在他们谈话的时候，上课铃响了。 ? 2 、 I?was?doing?my?homework?when?my?mother?came?back?home?yesterday?evening.? ? 昨天晚上妈妈回家的时候，我正在做家庭作 ? 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 引导的时间状语从句多用一般时态。 ? ? 例如： ? ? 1 、 While?they?were?talking?,?the?bell?rang.? ? 正在他们谈话的时候，上课铃响了。 ? 2 、 I?was?doing?my?homework?when?my?mother?came?back?home?yesterday?evening.? ? 昨天晚上妈妈回家的时候，我正在做家庭作 ? grammer I was watching TV. While I was watching TV, my sister was in the shower . My sister was in the shower . My brother was doing his homework. The telephone was ringing. When the telephone rang, my brother was doing his homework. “at the same time” 2.while, when, as辨析 While引导的时间状语从句只指一段时间，强调某一段时间内，主从句动作同时发生。从句动词常是延续性的 When既可以指一个时间点,也可以是一段时间，可表示主从句的动作同时或先后发生。从句动词可以是延续性的，也可以是非延续性的 while, when用法辨析： (1)While h