专四英语语法考点(上课课件)-课件PPT（演示稿）.ppt

专四英语语法考点考点一虚拟语气?考点1. 与现在事实相反。?从句谓语动词用did(be用were),?主句谓语动词would(should,could,might)+do;?if…+ did/were, …should/would/could/might + do?If I were you, I would….?。?从句谓语动词用:did(should+do或were + to do),?主句谓语动词用:would(should,could,might)+do。?if…+ did; should/were to + do, …should/would/could/might + do?。?考点3. 与过去事实相反。?从句谓语动词用had done,?主句谓语动词用would(should,could,might)+ have done;?if…had + done, …should/would + have + done?Had Judy been more careful on the maths exam, she _______ much better results now.?A. would be getting B. could have got?C. must get D. would get?,但从句的语序要用到装,即将were, had或should移至主语的前面形成倒装,但否定词not不前移。?例如:?, he would not have recovered so quickly.(05年)?'t he been taken good care of ? he not been taken good care of? not he been taken good care of ? he been not taken good care of?考点5. insist(一个坚持);mand(两道命令);suggest,advise, propose(三条建议);ask, require, request, demand(四点要求)及相应的名词的从句,谓语要使用:should+动词原形或动词原形例如:?58. It was mended that passengers ___ smoke during the flight.(04年)?A. not B. need not C. could not D. would not ?考点6. It is +advisable, essential,important,, imperative, incredible, strange, natural,necessary等等相关的从句,谓语要使用:should+动词原形或动词原形?考点7. it is high(about) time that的结构中,从句使用一般过去式。?例如:?It’s time that we did our homework.?注意与以下两种句型的区别:?(1) it’s time(+ for + sb.)+ 动词不定式,该句型表示“时间刚好做某事”,是陈述语气,表达一种事。?如:it’s time for us to have a 。?(2)it’s the first (second/ third) time+ that 从句,该句型中的that从句要用完成式,表示一种经历。?如: it’s the first time that I have been 。?考点8. much as尽管,虽然,引导让步状语从句,从句中用would have done表示假设,可以使说话人的语气变得十分委婉,真诚。?例如:?52. Much as ____, I couldn’t lend him the money because I simply didn’t have that much spare cash.(99年)? would have liked to would like to have ? should have to like should have liked to?考点9. if only表示要是…就好了相当与wish, as if/as though 的用法。与现在事实相反:动词过去式与过去事实相反: had + done与将来事实相反:could/would + d