常用于考时态的十大句型:总结计划汇报设计可编辑内容摘要:

premit sb to do= premit doing允许干 (4) forbid sb to do/ forbid doing禁止干 ( 5) have..done 让别人做(自己不做); have… doing让 …… 继续下去(后接延续性动词) ( 6) have sb do=make sb do 使某人干 ( 7) get… done 让 …… 干成; get… doing 使 …… 动起来 ; get done(状态 )变化 ; get sb to do 请某人干 ( 8) make sb do 使某人干 ; make oneself done使成 …… 状态 “情态动词 +have done”表推测一览表 情态动词 + have done 用法 例句 must have done 一定已经做了 They must have finished their work. can’t have done 不可能已经做了 They can’t have finished their work could have done 可能已经做了或本来可能做但未做 You could have used my puter because I didn’t use it. may have done 也许已经做了 They may have finished their work. might have done 也许已经做了或本来可以做但未做 You might have used my puter because I didn’t use it. Should/ought to have done 本来该做但未做 You Should have studied hard. need not have done 本来不必做但做了 You need not have gone out. would rather have done 过去宁愿做但未做 I would rather not have gone there. would like to have done 过去想做但未做 I would like to have seen the film. had better have done 当时最好做了某事 You’t better have gone there. “情态动词 +be doing”表推测一览表 情态动词 + be doing 用法 例句 must be doing 一定正在做 They must be watching TV now. can’t be doing 不可能正在做 They can’t be watching TV now. May/might be doing 也许正在做 They may be watching TV now. 口诀: “情动”加上 have done,推测事情已经干; “情动”加上 be doing,推测事情在进行; 条件状语从句中的虚拟语气 :条件句分为真实条件句 和虚拟条件句两种,真实条件句用陈述语气,虚拟条件句用虚拟语气。 (虚拟条件句是虚拟语气的重点) 虚拟条件句 关键是 要熟练掌握以下三大公式: 三个相反 从句 主句 与现在事实相反 If sb did/were… Sb would/should/could/might do… 与过去事实相反 If sb had done… Sb would/should/could/might have done/have been… 与将来事实相反 If sb did/were… If sb were to do… If sb should do… Sb would/should/could/might do… 宾语 从句中的虚拟语气:有三种情况。 一是在动词 insist(坚持 ), order( 命令) , mand(命令 ), suggest(建议) , advise(建议)。 Remend(建议,推荐) , require(要求) ,request(请求) , demand(要求) , desire(要求,愿望) , 等动词后面的宾语从句中一般用虚拟语气,其结构为 “主语 +should+动词原形”, 其中 should 可以省略。 把以上 10 个动词简称为 : 一个“坚持”,两个“命令”,三个“建议”,四个“要求”。 二是动词 wish 之后接宾语从句一定要 用虚拟语气。 从句的时态是: 与过去事实相反用 had done/had been, 与现在事实相反用 did 或 were,。
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