高中英语语法专题指导课件 --- 状语从句时间状语从句原因状语从句地点状语从句目的状语从句结果状语从句条件状语从句让步状语从句比较状语从句方式状语从句引导词 when whenever as while before after until (till) since as soon as onceeach/every timenext timethe first/…timethe momentthe minuteinstantlyimmediatelydirectly ( 一…就… )no sooner…thanhardly/scarcely…when1)when 的用法： was doing…when, be about to do… when“ 正在做 had done…when;be on the point of doing … when 某事 / 正要做… . 突然发生另一件事”。2.) 几种特殊句型与强调结构的区别： It is + 时刻 + when… It is/has been + 段时 + since… It will be/was + 段时 + before ( 现在时 / 过去时 ).“ 过一段时间…才” 3).before 的用法： A ：表“还未来得及…就…” B ：表“过一段时间才…”，4).until 的用法：在 not…until 结构中，谓语用短暂性动词， “直 到…才” ; 谓语为延续性动词，用 until 表“一直持续到…”。考查重点5) no sooner…than hardly/scarcely…when 刚……就A. 时态：主句用过去完成时（ had + pp ） 从句用一般过去时B. 倒装： no sooner/hardly/scarcely 放句首，主句要 到装She had no sooner arrived at the station than the train started to move.No sooner had she arrived at the station than ….He had hardly entered the hotel when it began to snow.Hardly had he entered the hotel when it began to snow1.We were told that we should follow the main road____we reached the central railway station. A. whenever B. until C. while D. wherever2.It is almost five years ____ we saw each other last time.(2005 北京 ) A. before B. since C. after D. when3.Simon thought his computer was broken _____ his little brother pointed out that he had forgotten to turn it on. (2005 北京春 )A. until B. unless C. after D. because B B A4.The American Civil War lasted four years ____ the North won in the end.(2005 广东 30) ...
