It's a long time since they left.的同义句

It's a long time since they left.的同义句 1.It's a long time since I left my hometown.A long time __ _ It's a long time since we met last(改为同义句） 1.It's a long time since I left my hometown. It's three months since they left us.(改为同义句) It's a long time since还是It has been a long time since it's a long time since i last saw you It's a long time since i saw you last. it's a long time since we met last It is for a long time that since i left you.这句话有语法错误吗 It's a long time since i saw you last 这句中的it是不是形式主语? 英语完成时的几道题1.It is two months since they left America.(同义句)Two