have worked 和 have been working有什么区别

have been worked 和have worked的不同? have worked 和 have been working有什么区别 英语翻译have i worked? I regret____ harder at school.A.not to have worked B.not having worked Three and four___seven.Two-thirds of the class_____.A.is;have worked it out B.is;have worked them out 这道题选哪个 How many men does your uncle ______ for him?(RDF)A.have worked B.have to work C.have working D.have been worked I have worked 和 I had worked 各自的意思举几个类似的句子 ________harder,you would have passed this exam.A.If you have worked B.If you worked C.Were you to work D.Had you worked By the time he graduates,i__in the accounting company for 5 yearsA had worked B will have worked Cwork D have worked选什么为什么 By the time he graduates,i__in the accounting company for 5 yearsA had worked B will have worked Cwork D have worked选什么为什么 ___harder,you could have have passed this exam.(B)A.Were you worked B.Had you worked C.if you worked D.If you have worked请详解一下,同时翻译一下 _____ hard before, Tom is afraid of failing in the exam. A. Having been worked B. Not to have worked C. Having never worked D. Never have worked为什么选C而不可以用Never having worked My brother regrets____ harder while young.A.not have worked B.not workC.not having worked D.not to work I ( )in the factory for over one year A.work B.worked C.have worked D.was working ----Have you worked out the troublesome problem yet __Yes .I ____________it out with the help of my wife after dinner .A.have worked B.worked C.had worked D.am working Who did you ______________ on it with you?A.have work B.have to work C.have worked D.have lotsof work.没看懂题目的说. 中学英语问题一道 ,he _____ very hard because he looked very tired.a must have worked b had to work c need have worked d needed to work Mary has got a full mark in the test.She _______very hard all these daysA.must have worked B.may workA和B用哪个好?