He has taught English in this university ever since he moved to this city

He has taught English in this university ever since he moved to this city Mr white_______in this school for20 years before he moved to LondonA has taught B taught C had taught 解释为什么选这个选项 Our English teacher _____ in our school since he _______ to China.A：has taught,come B：taught ,…come C：has taught,has come D：teaches,has…come He has taught here since 1981与He has been teaching here since 1981有什么区别啊? he has taught English ( for almost 30 years).(对括号里的提问） ___ ___ has he ____ English? Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teaching; has come D:has been teaching; came为什么选D?has been teaching是什么时态? My mother has taught english he has never visted the Great Wall 类似这样的句子中的has是什么成分如题My mother has taught english he has never visted the Great Wall 、两句 He has taught in our school for 4 years（对for 4 years提问） tom has taught english here since he graduated fro oxford university什么意思 Peter has taught himself english for two years?为什么用 himself,而不是he或者his? iwang li’s father has taught english here since he graduated from peking un He has taught here since he came here.一句中对since he came here进行提问怎么说 有这样一句话：He ______(teach) in this school since he came here last year.横线上填什么好些?到底是had taught. 还是has taught. Bill has a lot of teaching experience ,has't he?--Yes,indeed_English since 1950A He's taught.B He's teaching C He was teaching D He'd taught 选什么 Mr zhang has taught more than ten years so he has a lot of e_____ of teaching.这个怎么填? --Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught为什么不选B? --Is your father a teacher of English in the NO.1 Middle School?---No!But he ___English there for ten years.A.has taught B.has been teaching C.taught D.had taught　答案是C为什么不选B? 一些英语选择题,1.He ___ in our school for 20 years and he __a_ here in 1977.A.has taught; came B.has taught; has come C.taught; came D.has teached; has came2.She _c___ over to me as soon as she caught sight of me.A.is walking B.walks C.walked