"ever since"和"since"都表示从过去的某个时间点到现在的持续。然而，它们之间有一些语义和用法上的差异。
1. 强调：
"ever since"强调从过去某个事件开始直到现在持续不断的过程。它强调自那时以来一直持续发生的动作或状态。
例如：I've been a fan of this band ever since I heard their first album.
"since"表示从某个过去时间点开始，到现在为止。它侧重于从某个时间点开始的概念，而不是整个过程的持续性。
例如：I've been a fan of this band since 2010.
2. 用法：
"ever since"通常用于强调从过去的某个事件开始到现在的持续性，可以用于现在完成进行时、现在完成时等时态。
例如：He has been studying ever since he arrived.（自从他到了以后就一直在学习。）
"since"可以用作连词，引导从句，表示自某个时间点开始；
例如：It has been raining since this morning.（从今天早上开始就一直在下雨。）
"since"还可以作为介词，后接某一具体时间点；
例如：I haven't seen her since last week.（自从上周以来我就没见过她了。）
总之，"ever since"和"since"都表示从过去某个时间点到现在的持续过程，但"ever since"更强调持续性，而"since"则侧重于从某个时间点开始。在用法上，"since"可以作为连词和介词，而"ever since"主要用于强调过程。
ever since和since区别：
1、ever since和since意思是一样的，用法有区别。 ever since后面可以不加任何东西，也可以加名词或者加从句。
2、since 可以放在句末，或者句首。
拓展资料
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。
5、Ever since World War the United States has been Japan's principal trade partner.
二次世界大战以来，美国一直是日本的主要贸易伙伴。
since
1、Jacques Arnold has been a member of parliament since 1987
雅克·阿诺德自1987年以来一直是议会议员。
2、The percentage increase in reported crime in England and Wales this year is the highest since the war
今年英格兰和威尔士报道的犯罪增长率是战后以来最高的。
3、About six thousand people were arrested, several hundred of whom have since been released
约6,000人被捕，后来其中的几百人又被释放了。
4、Even though her parents have long since died, she still talks about them in the present tense.
尽管双亲早已离世，她谈论起他们时好像他们至今健在。
5、I'm forever on a diet, since I put on weight easily
我永远都在减肥，因为我很容易长胖。