it's been ten years 为什么不加for

it's been ten years 为什么不加for The man has been dead for ten years(同义句） It”s ten years__the man__ It's been five or ten years from happenning for about 50 years怎么翻译呀? 如何将It's been ten years since they married变一般疑问句 It's ten years since we last met in Beijing?句型中is能否用has been来替换 how long have you( its about ten years since we( ) a married,narriedb been married,were married c.got married,got married d.been married,got married it's seems like years since it's been he likes barbecues better than picnics(举行转换）he_____ _____ have barbecues _____ have picnicsSusan has been in this city for more than ten years.It's more than ten years _____ Susan _____ to this city. It’s Nanjing in ______he has been living for more than ten years.A that B where C what D which Only ten minutes, but, it's ten most close time in these years.什么意思 It has been ten years since I ___(be) a teacher. —It's seond time that I__shanghai---What geat changes!It's ten years since I ——it last timehave been;left 我选的是come ：had left为什么 He's been playing golf for ten years..He 后面是 has 连词成句：collecting,since,years,ten,old,was,he's,been,matches,he collecting,since,years,ten,oid,was,he's,been,matches,he 连词成句 It is ten years since Miss Green returned to Canada为什么不用It has been ten years since Miss Green returned to Canada It's+been+in+Boston+for+over+250+years. 英语语病改错1.It's said a new hospital will be built in which used to be a wasteland ten years ago2.The poor girl's eyes got blind gradually after they had been infected by some bacteria