ever since后面一般不接一个时间状语从句。比如
I have been a member of Party ever since.(我此后就一直是党员。至于此指代的是什么时候，前面一定有交代。)
since then（常接现在完成时）
从那以后
He has disappeared for ever since then.
从那以后，他就永远地失踪了。
Ever since then the Chinese people have stood on their feet.
我们中国人从此站立起来了。
Ever since then I have been longing to meet him face to face.
从那时起我一直渴望和他面对面地聚会。
Ever since then, she fell in love with drama and tried to express her inner feelings by way of drama performance as well as being involved with script translation.
从此，她喜爱上戏剧并尝试把自己内心的感受通过表演和翻译戏剧的方式表达出来。