if he knew this ,it would have had to be by accident句子成分it would have had to be其中have had是怎么回事?

if he knew this ,it would have had to be by accident句子成分it would have had to be其中have had是怎么回事? ____ he knew nothing about her.A.It seems that B.It seems as if it always He knew before he started this building it would be like this,it always was.前面讲的是主角很累.怎么翻译好? 选择题（时态）How strange it is! He looks as if he __________ all about it．A knows B know C knew D has knew 请说明一下as if前后用法 谢! it seems------the boy knew everything,though in fact he does nota,like bthat c,as if （ ） he was very young.The boy knew a lot about it.A.Allthough B.When C.If D.Because 请问seem是及物动词还是不及物动词啊,后面可以接宾语从句吗?It seemed as if the good man was trying to teach us all he knew at this last lesson. 这里as if引导的从句是什么从句啊?谁能告诉我as if在这里引导的 He told as if he knew everything.还是He told as if he had known everything. He has just arrive but he talks as if he knew all about it.为什么用knew?为什么不用know?是不是只有在主句的谓语动词是实意动词才用虚拟语气?谢谢了两位老师! 英语翻译the policeman asked John if he knew the victim. 关于anybody和somebody.He knew that if he told ___ else about it,it would be the end of zoo.He knew that if he told ___ else about it,it would be the end of zoo.空中该填anybody还是somebody?为甚? if i knew that i had taken out it Idiot if I knew it wouldn't be a surprise! 英语翻译If you knew you only three yeas left to live,how would you time?It's a hard question and few of us would even like to think about it.But 18 yeas old Huang Ge has to answer this question and he says,“I want to thank the people who have h 英语翻译If you knew you had only three years left to live,how would you use your time?It' s a hard question and few of us would even like to think about it.But 18-year-old Huang Ge has to answer this question and he says,I want to thank the peo 英语翻译Just at this moment ,she back into the river .if she were carried down it would be certain dealth l knew. 1.talked,he,as,it,he,all,if,knew,about(连词成句) 2.To1.talked,he,as,it,he,all,if,knew,about(连词成句)2.Tom had thought of (everything)except the weather.【对括号部分提问】3.The sun set.We return to our hotel.（用as soon as连接两 Tom told us about the exciting news______ he knew all about it.A.as well B.as if C.as usual D.as for 请问选什么?为什么?