since 和ever since，都可以用作：副詞（單獨使用）；介詞（接名詞性詞語）；連詞（接從句）
壹、ever since
英 [?ev? sins] 美 [v? s?ns]
adv.自從;從那時到現在;自…以後;從…起
擴展例句
1、Ever since World War the United States has been Japan's principal trade partner.
二次世界大戰以來，美國壹直是日本的主要貿易夥伴。
2、Ever since we moved last year, I worry a lot about whether I can handle this new job
自從去年我們搬家，我就壹直非常擔心能否做好這份新工作。
3、He came here for a holiday several years ago and he's lived here eversince.
幾年以前他來這裏度假，從那以後他便壹直居住在這個地方。
4、He inherited his father's fortune and has lived like a pig in clover eversince.
他繼承了他父親的財產，生活極為奢侈。
二、since
英 [s?ns] 美 [s?ns]
prep.自從;從…以來;自從…之後
adv.以後，此後;後來;（距今幾年）以前;（從那時候起幾年）以前
conj.因為;既然;自從…以來;自從…的時候起
擴展例句
1、Even though her parents have long since died, she still talks aboutthem in the present tense.
盡管雙親早已離世，她談論起他們時好像他們至今健在。
2、I'm forever on a diet, since I put on weight easily
我永遠都在減肥，因為我很容易長胖。