It's a long time since i saw you last 这句中的it是不是形式主语?那有没有真正主语？这句句子里有没有真正主语？是什么?

it's a long time什么意思 It's raining for a long time? it's a long time 和 it's long time 的区别 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 Hi Mary It's been a long time .语法填空 It's a long time since it raimed last time帮忙翻译下这句话, It's A Long It's a long 找一首英文歌 第一句是it s been a long long time Rocket Man (I think It's Going To Be A Long Long Time)歌词 It's high time you had your hair cut;it's getting_______.A.too much long B.much too long It's a sunny day again.It ________(not rain) for quite a long time. It;s a sunny day again!It _(not rain)for a quite long time It's been a long time since I last saw a film.还是It's a long time since I last saw a film. it is+时间段+since的用法 当主句有last该怎么办,和时间段+since的用法一样么?这里有三道题It's a long time since we___(meet)last year.It's a long time since we___(meet)last,isn't it?More than 15 years ___(pass)sin it's a long road It's been a long