It's been 2 years ____ I went to London and I've been used to living thereA before B since C after D when请讲解

it's seems like years since it's been It's several hundred years old.(同义句替换) It __ __ several hundred years ago. 翻译 It's five years since he smoked It has been 2 years since we worked here It's+been+in+Boston+for+over+250+years. it's been ten years 为什么不加for her grandmather has been dead for two years同义句it ___ two years since her grandmather __ It's been five or ten years from happenning for about 50 years怎么翻译呀? “It’s been five or 10 years from happening for about 50 years,” says Eric Berger, it's been six years这句话什么时态 been 的作用与时态 It's been 2 years ____ I went to London and I've been used to living thereA before B since C after D when请讲解 it __ about fifteen years since he __ his hometownA.is;leftB.has been;leaves为什么有since的时候不用完成时 he's been in Japan for six years.=it ___ six years ___ he came to Japan lucy has been away from hei home for three years等于 it's three years ______lucy ___ __________ Lucy has been away from home for two years.（改同意句） It's two years since Lucy________. Lucy has been away from home for two years 句型转换 it's two years since Lucy（ ）（） I have been learning English for two years.=It's two years _____ I _____ to learn English. It's about three years since they＿here.是填came还是have been? 如何将It's been ten years since they married变一般疑问句