He's loved Maths since he 后面应该填什么?

应该填什么得看上下文.如果没有上下文,填上一个过去发生的事件,只要意思合理就行,因为主句是一般现在时 has loved.
1.He's loved maths since he went to school.（自从他上学,他就爱上了数学.）
2.He's loved maths since he began to learn it.（自从他开始学数学,他就爱上了数学.）
3.He's loved maths since he met Mr.Wang.（自从他认识了王先生,他就爱上了数学.）