2020届二轮复习情态动词和虚拟语气课件（47张）

2020届二轮复习情态动词和虚拟语气课件（47张）

2020 届二轮复习 情态动词和虚拟语气 情态动词＋ have done 用法 must have done 一定做过某事，其否定形式为 can't/couldn't have done can/could have done 1. 本来能够做但却未做 2. 可能做过某事 can't/couldn't have done 不可能做过某事 may/might have done 或许 / 可能做过某事 should/ought to have done 本该做但却未做，其否定形式表示本不该做但却做了 needn't have done 做了本没有必要做的事情 if 条件从句 从句的谓语形式 主句的谓语形式 表示现在情况 动词过去式 (be 的过去式用 were) should/would/could/might ＋动词原形 表示过去情况 had ＋过去分词 should/would/could/might ＋ have ＋过去分词 表示未来情况 should ＋动词原形 should/would/ could/might ＋动词原形 动词过去式 were to ＋动词原形 if 省略句 如果虚拟条件句中含有 were /had/ should ，可把 if 省略，把 were /had/ should 提到主语之前形成倒装，若为否定形式， not 不可提前。 混合条件句 有时条件句的动作与主句动作发生的时间不一致，这时动词的形式应根据它们各自表示的时间加以调整。 含蓄条件句 ① 有时假设的情况不用条件从句表达，而是用 but for ， without 等介词 ( 短语 ) 或上下文来表示条件。 ② 用连词 otherwise ， or 等暗示后文与前面的情况相反，从而引出后文的虚拟语气。 ③ 虚拟条件通过 but 暗示出来，模式为 “ 虚拟情况＋ but ＋真实情况 ” 。 与现在事实相反 从句用一般过去时 与过去事实相反 从句用过去完成时 与将来事实相反 从句用 would ＋动词原形 针对训练 Ⅰ . 用适当的情态动词填空 1 ． ________I have a word with you? It won't take long. 【 答案 】 　 Can 2 ． Although you ________ find bargains in London ， it's not generally a cheap place to shop. 【 答案 】 　 can 3 ． — I've prepared all kinds of food for the picnic. — Do you mean we ________ bring anything with us? 【 答案 】 　 needn't 4 ． It was sad to me that they ， so poor themselves ， ________ bring me food. 【 答案 】 　 should 5 ． Life is unpredictable ； even the poorest ________ become the richest. 【 答案 】 　 might 6 ． I still remember my happy childhood when my mother ________ take me to Disneyland at weekends. 【 答案 】 　 would 7 ． I've ordered some pizza ， so we ________ worry about cooking when we get home tired. 【 答案 】 　 needn't 8 ． Since nobody gave him any help ， he ________ have done the research on his own. 【 答案 】 　 must 9 ． — Why are your eyes so red? You ________ have slept well last night. — Yeah ， I stayed up late writing a report. 【 答案 】 　 can't 10 ． My mom suggests that we ________ eat out for a change this weekend. 【 答案 】 　 should Ⅱ . 用所给动词的适当形式填空 1 ． ________(be)there no modern telecommunications ， we would have to wait for weeks to get news from around the world. 【 答案 】 　 Were 2 ． If Mr Dewey ______ (be)present ， he would have offered any possible assistance to the people there. 【 答案 】 　 had been 3 ． We would rather our daughter ________ (stay)at home with us ， but it is her choice ， and she is not a child any longer. 【 答案 】 　 stayed 4 ． If he ________(catch) the morning train ， he would not have been late for the meeting. 【 答案 】 　 had caught 5 ． They were abroad during the months when we were carrying out the investigation ， or they ________ (come)to our help. 【 答案 】 　 would have come 6 ． It was John who broke the window.Why are you talking to me as if I ________ (do)it? 【 答案 】 　 had done 7 ． We ________(be)back in the hotel now if you didn't lose the map. 【 答案 】 　 would be 8 ． — Where are the children? The dinner's going to be completely ruined. — I wish they ________ (not be) always late. 【 答案 】 　 weren't 9 ． He insisted he ________ (send) to the city. 【 答案 】 　 (should) be sent 10 ． His expression suggested that he ________ (pass) the test. 【 答案 】 　 had passed