重点句型 考点九 can/could have done [基础过关] can/could have done 表示对过去发生的行为进行推测.常译为“可能 .“会 .一般用于否定句和疑问句 He can’t/couldn’t have done it because he was an honest man. 他不可能做这件事.因为他是个诚实的人 Can/Could the work have been finished on time? 这项工作能按时完成吗? [点拨]could have done还可用来表示责备或批评.常译作“本来可以 .“本来能 等.You could have been more considerate.你本来可以更慎重些. [拓展延伸] must have done 常用于肯定句.意为“一定 .“肯定是 . may/might have done 意思是“可能 .“也许 常用于否定句和肯定句中. should have done 本该------- needn’t have done 本来不需要--- would have done 本来会------ It must have been very late when he left the office. 他离开办公室时.一定很晚了. He may/might have heard it from Mary.他可能从玛丽那里听说了此事. [典型例题] -----Did you visit the Big Ben in London? -----No, we it, but we spent too much time shopping. A. could visit B. could have visited C. must have visited D. can have visited [答案]B 考查情态动词表猜测. [点拨]could have done表示“原本能够完成但事实并非如此 考点十 ----- when heated 状语从句的省略 [基础过关]----when heated=when it is heated属于状语从句的省略形式 [点拨]1)在世界.地点.条件.方式或让步状语从句中.当状语从句的主语与主句的主语一致或从句中有it is时.状语从句常采用省略形式 2)此结构中常见的连接词有when,while,until,if,once,unless,even if,as, as if,though,although等,连词后的部分常见形式为:现在分词.过去分词.形容词.介词短语等. He will not come unless invited. 除非接到邀请.否则他不会来的. If possible, I will call on my teacher next month. 如果可能的话.下个月我将去拜访我的老师 [典型例题] A harmonious society is like a symphony or orchestra----each person contributes a small sound, but when with other sounds, it becomes beautiful music. A combining B. being combined C. combined D. to be combined [答案]C 考查状语从句的省略现象 [点拨]当状语从句的主语与主句的主语一致或从句中有谓语动词be时.则可以省略从句中的主语和be.而combine与逻辑主语之间为被动关系.因此用过去分词 [实战演练] 【查看更多】
