it was 3 years before i had graduated from the university 对吗?
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。
It was three years since i had graduated from the university . 我已经毕业三年了。
before - ago
这样就是强调句了:It is 3 years ago that I graduated from the university.
it is/was -+时段+since从句(用一般过去时)