it was 3 years before i had graduated from the university 对吗?也就是it is 过去式 before 过去完成时

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it was 3 years before i had graduated from the university 对吗?也就是it is 过去式 before 过去完成时
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it was 3 years before i had graduated from the university 对吗?也就是it is 过去式 before 过去完成时
it was 3 years before i had graduated from the university 对吗?
也就是it is 过去式 before 过去完成时

it was 3 years before i had graduated from the university 对吗?也就是it is 过去式 before 过去完成时
如果想说“我大学毕业后已经过了三年”,不能用 before,应该改为 since,即 ：
 
it was 3 years (since) I had graduated from the university. 
 
　　it 是指代时间的非人称代词,意思是直译是‘自从我大学毕业以来,时间已经过了三年’.
 
如果用 before,可以说——
 
it had been 3 years before I graduated from the university,
 
　　但是意思成了“三年过去了,我才大学毕业（直译是‘在我大学毕业以前,时间已经过了三面’）”.
 
用 since,过去的“毕业时间” 早于 “三年过去”；用 before,“三年过去” 早于过去的“毕业时间”.
 
关于 since 的用法
 
1、如果主句说明的是现在的情况,主句用现在完成时态,从句用一般过去时态.如：
 
We have both changed since we parted.  （从那时）分别以来我们（现在）彼此都变了.
 
2、如果主句说明的是过去的情况,主句用一般过去时态,从句用过去完成时态.如：
 
We both changed since we had parted.  （从过去的过去）分别以来我们（那时）彼此都变了.
 
3、如果主句是表示时间的“ it + 系动词”结构,说明现在情况时,主句用 is,从句用一般过去时；说明过去情况时,主句用 was,从句用过去完成时.如：
 
It is three years since we was there. 自从（过去）到那儿以来,（到现在）三年已经过去了.
It was three years since we had been there.  自从（过去的过去）到那儿以来,（到那时）三年已经过去了.
 

was - is
before - ago

这样就是强调句了：It is 3 years ago that I graduated from the university.

It is three years since i graduated from the university . 我已经毕业三年了。
It was three years since i had graduated from the university . 我已经毕业三年了。

  • it is/was -+时段+since从句（用一般过去时）

it is over 30 years （）shengzhen was established as a special zone……befor since那个为什么 The English book was so interesting that she had read it for 3hours_she realized.A.when B.until C.befor D.after为什么选C It was 85 years还是 it has been 85 years? It was three years before he came it was about 100 years ago It's 3 years since I saw him last time.能不能换成it was... It is hard the work befor supper as it was和what it was的区别the road is 3 times as/what it was 3 years ago 用as it was还是what it was请说下理由. Once,I let a ture love,slip away befor my eyes,Once,I let a ture love,slip away befor my eyes,only to find myself regretting when it was too late It is anyhow cleaner than it was 100 years ago It took them nearly 3 years ( before )the new stadium was completed.为什么不用until it was eight years ag和that was eight years ago有区别吗? it was 和it is +before这两个的时态要注意吗it is 3 years before they.和it was 3 years before they.从句主句后面的时态怎么用 it is 3 years since he has been a doctor 怎么翻?还有it is 3 years since he was a doctor 怎么翻译1? it was 3 years before i had graduated from the university 对吗?也就是it is 过去式 before 过去完成时 请问it be…before…的句型用法…比如说it was 3 years before he … It was 3 years ago ______ he came back.我知道答案是after,请知道的告诉我,原题是:用before after since填空It was 3 years ______ he came back.It was 3 years ago ______ he came back.It is 3 years ______ he came b It was ten years since I left my hometown.改错