ever用完成時。ever since可作為副詞，解釋“此後”（就一直……），是完成時的標誌。He fell ill at Christmas and has been ill ever since.他在聖誕節生病了此後就一直不適。

ever since釋義：自從；從那時到現在；自…以後；從…起

ever since的用法

1.ever since的結構：(作為連詞)=since完成時態----ever since+主+動詞簡單過去式

例：I have known him ever since he was a child. 他從小我就認識他了。這種用法同since差不多，不過ever since比since用得少。

再如：We have lived in Shanghai ever since we came to China.(自從我們來到中國之後就住在上海。)

2.以上所說的ever since作為連詞。ever since也可作為副詞，解釋“此後”(就一直...)。例：

1)He fell ill at Christmas and has been ill ever since. 他在聖誕節生病了此後就一直不適。(has + be ill)

2)He left home last year and has been away ever since. 他去年離家走了，此後一直在外面。(has+be away)

3)He fell off his horse a week ago and has been in bed ever since. 一週前他從馬背上跌下來，從那以後就一直躺在床上。

4)He went to Turkey in 1950 and has lived there ever since. 他在1950年去土耳其，此後就一直住在那裡。