Mr.Smith has been here since the factory opened为Mr.Smith has been here since the factory opened为什么用has been?

If Mr Smith _______ here, he would have helped youhad beenB. wasC. wereD. has been 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? Mr.Smith has been 什么hospital什么last month Is Mr.Smith still in Shanghai?—Yes,he ______ there for two months.A.has beenB.has goneC.has been toD.has gone to Mr.Smith has been here since the factory opened为Mr.Smith has been here since the factory opened为什么用has been? Mr Smith __________ at this school since he ________ Xiamen .A.has been teach,came B.has been teaching,came C.taught,came D.has been teaching,has come Hello,May I speak to Mr.Smith?—Sorry,he isn't in.He _____ the office.A.has been to B.has gone to C.has been awayc D.has left mr smith new york last week=mr smith new york last week=mr smith to new york lastweek2.my uncle has been to paris [once]就括号部分提问has your uncle been to paris3.i have watched 【the film】就括号部分提问he is already got some books Mr.Smith is not at home.He___to work.A.has gone B.has been C.had been D.had gone Mr Smith has worked in this factory since he ( )to China A.has moved B.moved Mr Smith has little acquaintance __modern poetry whilt he has a wide knowledge__painting填介词 (Mr.Smith's passport) has been issued括号里面的是什么关系啊?不是主谓,是. Mr Smith ________ to America 10 years ago and has been there___________. Mr.Smith has been ____in his research for more than 3 hours. Mr Smith works in beijing,he has been there since 1978为什么是has been 而不是has gone呢 不是说 has been表示去过么 已经回来了的 比如说 has been there twice 表示去过两次而has gone 表示 去了 在那 还没回来么? mr smith has been a professor since 1994 保持原句意思：保持原句意思：mr smith has （ ）（ ）a professor for about ten years Is he Mr.smith 改错 Mr Smith works with a chemical company,but he_ for the industrial fair,since he is on leave.Mr Smith works with a chemical company,but he ______ for the industrial fair,since he is on leave.A.has worked B.worksC.has been workingD.is working这句话