since+延续性动词的疑问It is many years since I enjoyed so much last

一、 enjoy后接名词或代词.
They are enjoying their dinner.
他们在津津有味地吃饭.
二、 enjoy后面可接动词的-ing形式.
I enjoy listening to light music.
我喜欢听轻音乐.
三、 enjoy后面可接反身代词(oneself),构成固定搭配enjoy oneself,意为“过得愉快、玩得高兴” ,相当于have a good time.
— Did you enjoy yourself at the party?
你在聚会时玩得高兴吗?
1. enjoy后接动词时必须接动词的 -ing形式,不能接动词原形或动词不定式（to do）.
他喜欢踢足球.
[误] He enjoys play football.
[误] He enjoys to play football.
[正] He enjoys playing football.
2. enjoy后只能接表示褒义的词组.
他母亲身体不健康.
[误] His mother enjoys very poor health.
[正] His mother doesn't enjoy good health.
首先你要明白enjoy的用法 其次 关于since的用法
since的用法主要有两点：一是表示“自从……以来”,二是表示“既然”之意
若since引导的状语从句的谓语动词是持续性动词或表示状态的动词的过去时时,则从句表示的时间是“从那持续动作或状态结束时算起”.如：
I haven’t heard any noise since I slept. Sleep 为持续性动词,sleep的动作结束时,即“醒来”时,这句应译为“我醒后还未听到任何声音”.
三、若since引导的状语从句的谓语为持续性动词的现在完成时,则表示动作和状态延续到现在（说话时刻）,其表示的时间的起点应从动作发生之时算起
现在解释你的问题 距离我上次开心已经过去很多年了 enjoy是延续性动词 你可以看上面的解释 希望对你有帮助

rerer