完成时。ever since可作为副词，解释“此后”(就一直..)，是完成时的标志。eversince的结构：(作为连词)=since完成时态----ever since+主+动词简单过去式。例句：She had been worrying eversince the letter arrived。

ever since adv. (从句用过去式,主句用完成时)。

1、从那时到现在; 自从;自…以后;从…起。

2、迄今,从那时起(一直),直至今日,自那时以来,此后一直。

3、自…以来;一直到今。

ever since

1、He's been there ever since you left!

自从你离开后他就一直在那里!

2、I simply gave in to him, and I've regretted it ever since

我就向他屈服了，从那以后我一直后悔。

3、I've had the hots for him ever since he came to college.

自从他来上大学后，我就对他春心萌动。

4、The girl has grown prettier than ever since I saw her a year ago.

一年不见，小姑娘出落得更漂亮了。