how long has Jim been at this school?回答为什么要用since 3 years ago不用3 years ago?how long不是提问一段时间吗?

how long has Jim been at this school?回答为什么要用since 3 years ago不用3 years ago?how long不是提问一段时间吗? --How long have you been here?--Only ten minutes.Jim ( )here with me.A.walked B.has walked 选哪个?为什么? How long has Jim ____at this school? a.arrived b.come c.studied d.gone请速回答,并附解释 how long has the meeting()?AbegunBstartedCoverDlasted 是how long has she been learning…还是how long has been she learning… 为什么是How long has he been there 而不是How long has he gone there 用since、for或ago填空.1.How long is it () you wrote to your sister?.用since、for或ago填空.1.How long is it () you wrote to your sister?2.How long () did you write to your sister?3.Jim has been working in Asia () he left England. how many pets does jim have回答jim has ten pets对吗? could you tell me __?B.how often you go to the mall D how long you have bee at this company How long has she been dead?=How long _ _ _ she How long does jim watch TV（改为同义句） ______ _______ _______ does jim watch TV. 翻译How long has this food store been in business? How long has he been in the hospital?翻译 How long has it been since.这是什麼用法 意思 填空:How long has Mr.Black been t_______in this school? how long has your brother () the new dictionaryAborrowedBlentC boughtDhad how long has your father worked in the company? (改错)How long has Lu Xun died?怎么改呢?