was doing、had been doing和had been done都有什么区别?was doing和had been doing不是都是指过去一段时间做的事情吗?他们俩有什么区别吗?had been doing 和 had been done 又有什么区别. 话说我在写英语句子时不

she -----things for other people.A had always been doing B had always done C was always doing D was always done 一定要说理由哟 ----Has Tom finished his home work yet?----I have no idea;he[ ] it this morning.A.was doing B.had been doing C.had done D.did I’ll go to the library as soon as I finish what IA.was doing B.am doing C.have done D.had been doing He ___ his lessons from seven to nine last night .A.did B.had gone C.was doing D.has been doing(带句子翻译, had been doing 是什么时态? had been doing是什么时态 had been doing是什么时态 was doing、had been doing和had been done都有什么区别?was doing和had been doing不是都是指过去一段时间做的事情吗?他们俩有什么区别吗?had been doing 和 had been done 又有什么区别. 话说我在写英语句子时不 He was made,as had been expected,_____ much housework during his summer holidays.A.be done B.do C.doing D.to do --has jack finished his homework yet?--i've no idea,but he___it this morning A.was doingB.had been doing C.has done D.did Would you have called her up had it been possible?Yes,but I ___busy doing my homework.A.was B.were C.had been D.would be 这个题怎么选啊?为什么? 37.Would you have called her up had it been possible?Yes,but I ________ busy doing my homework.37.—— Would you have called her up had it been possible?Yes,but I ________ busy doing my homework.A.was B.were C.had been D.would be选啥?为啥? What___your grandma___this time yesterday?A.is,doing B.was,doing C.did,do D.had,done —Has Tommy finished his homework yet?—I have no idea; he ---it this morning.A.was doing B.had been doing C.has done D.did 选A 还是B 是最好的答案 --Hi,Tracy,what are your parents doing?--They___the living room the whole morning--Hi,Tracy,what are your parents doing?--They___the living room the whole morning.A.will paint B.had painted C.have been painting D.was paintig had been doing 和had been done有什么差别 had been doing 和had been done有什么差别? When the dolpin ( ) by sea ,it ( ) A discovered had killed B was discovered had been killedC discovered had been killed D was discovered had killed 为什么?