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大学英语六级考试词汇笔记(4)

　　大学英语六级考试词汇笔记

　　51. He must have had an accident, or he _A_ then.

　　A would have been here B had to be here C should be here D would be here

　　must have + 过去分词表示对过去行为的肯定推测;

　　与过去事态相反用：情态动词 + have + 过去分词来体现虚拟语气;

　　must 一定，必须; neednt, dont have to 不必;

　　53. You _A_ all those calculations! We have a computer to do that sort of thing.

　　A neednt have done B must not have done

　　C shouldnt have done D can not have done

　　should have + 过去分词本应该，本应当; shouldnt have done本不应该，本不应当;

　　44. It was very kind of you to do the washing-up, but you _D_ it.

　　A mustnt have done B wouldnt have done

　　C mightnt have done D didnt have to do

　　52. It was essential that the applications forms _C_ back before the deadline.

　　A must be sent B would be sent C be sent D were sent

　　It be essential that 后面一定用虚拟语气，且句子谓语动词固定为 + 动词原型;

　　It was essential that the applications forms send back before the deadline.

　　53. We _D_ our breakfast when an old man came to the door.

　　A just have had B have just had C just had D had just had

　　when 还可以表示①刚..就、②恰在此时;

　　44. I had just started back for the house to change my clothes _D_ I heard voices.

　　A as B while C after D when

　　45. I felt somewhat disappointed and was about to leave, _C_ something occurred which attracted my attention.

　　A unless B until C when D while

　　64. It was essential that these application forms _D_ back as early as possible.

　　A must be sent B will be sent C are sent D be sent

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