一道单选must have been 和would have been的区别?Jack described his father, who _______a brave boy many years ago, as a strong–willed man A. would be B. would have been C. must be D. must have been 我不能理解为什么不能用would表示

一道单选must have been 和would have been的区别?Jack described his father, who _______a brave boy many years ago, as a strong–willed man A. would be B. would have been C. must be D. must have been 我不能理解为什么不能用would表示 一道英语单选 _____he have been chosen as captain of the football team?Yes,he_____.A.Can;must have B.Must;must have C.Can;must D.Must;must must be和must have been有什么区别he must have been sleeping.为什么这里要用must have been而不用must be i think he must have been a mechanic,中的must和have been是什么词啊? 一道英语单选题,Had I had the time .I _______you .but I _________really occupied the whole week .A.would help ,had been B.would have helped ,was C.helped .have been D.should have helped ,must be 应该选哪个?为什么? may have been和 must have been been是不是不仅表示被动? must have been done must have done must have/ must have been的区别 can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done 十万火急~英语单选3It took 10000 people more than 10 years to build the Great Pyramid.Oh,that ___a very hard task.A must be B should be C must have been C should have been 选什么? must have been和can't have been和现在完成时有没有联系啊 MUST have been donemust have been doing must have been +名词must have done以上的区别还有是否有must have been done 的用法 和区别EG1 I must have been sleeping 2 your dress must have been expensive.3 I didn't hear the phone,I must have 英语中,must have been 和 must have +过去分词,有什么区别如题 i must have watched 和 i must have been watch TV意思一样吗 为什么 can't have been和must have been每一个的用法 一道完成句子she knows this place so well ,she (must have lived) here.为什么不用must have been lived? 一道英语单选,希望各位高手解答,麻烦把理由写清楚Where have you __these day? I have __to YangzhouA. been gone B. been been C.gone been D.gone gone 在英语里coms been、must been和may been和come have been、must have been和may have been的区别?请举例!哪些词是宾语、定语、介词,请举例!coms应该是comes