It's a long time since …… 后加什么时态是固定的吗还是看情况这是固定句型吗?

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It''salongtimesince……后加什么时态是固定的吗还是看情况这是固定句型吗?It''salongtimesince……后加什么时态是固定的吗还是看情况这是固定句型吗?It''salongtim

It's a long time since …… 后加什么时态是固定的吗还是看情况这是固定句型吗?
It's a long time since …… 后加什么时态是固定的吗还是看情况
这是固定句型吗?

It's a long time since …… 后加什么时态是固定的吗还是看情况这是固定句型吗?
since的四种用法
1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980,last month,half past six).
I have been here since 1989.
2) since +一段时间+ ago
I have been here since five months ago.
3) since +从句
Great changes have taken place since you left.
Considerable time has elapsed since we have been here.
4) It is +一段时间+ since从句
It is two years since I became a postgraduate student.
你的是第四种情况
固定句型.可以这么说吧,不过算是一种很经典的句型,在我给你的网址里有简单介绍,就是“35种经典句型”.

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

It's a long time since …… 后加什么时态 是固定的吗 还是看情况这是固定句型吗?

It's a long time since …… 后加什么时态是固定的吗还是看情况这是固定句型吗?