▲我觉得第一句至少应改为：

3 years passed, and I meet her again.

这个句子是个并列句，其中，3 years passed（三年过去了）是个简单句，并非时间状语。

▲第二句中的 3 yearslater（三年后） 是时间状语。

这两个句子当中的meet似乎也应改为 met。

▲pass 与 later 的用法：

1. pass [I] (of time) go by; be spent （指时间）消逝, 过去

A few years passed and he wanted to work.

Three years passed, and I had not lost my ambition to become the headmaster of a grammar school.

2. later adv. 以后, 稍后, 随后

I met her again three years later.