My father has worked in this factory ____ we moved to this city A before B after C since D for

My father ___(work) in the factory since three years ago.A has worked B has begun to work为什么 My father worked in factory ( ) 1998. my father-------in the factory for thirty years,and now he is at homeworked 可不可以用has worked by the time he retires ,my father ——for almost forty years .为什么不是has worked 而是will have worked .His father since he__________.A.has worked,came B.has worked,works C.worked,has.His father since he__________.A.has worked,came B.has worked,works C.worked,has come D.haswork,came 填哪个? -How long has his father worked in that city?-he has worked there s___ last year. My father ___(work) in the factory since three years ago.答案是has worked,我填has been working,可不可以呢?为什么 how long has your father worked in the company? My father has a nuw 改否定句:My father worked in a hospital My father worked in a hospital.(改成否定句) My father has worked in this factory ____ we moved to this city A before B after C since D for 定语从句 The farm _____ my father once worked has taken on a new look now 填介词+关系代词并说明理由 My father used to live in the countryside and he______there for over twenty years.A.has morkedB.worked（正确）C.had workedD.works ___ then,my mom has worked as a teacher. My father has d____to give up smoking 翻译My father has lunch at school my father后是加have还是has