8年以后英文

A few years later 或者several years later

several years later

i will be a professional basketball player after 8 years training.when i was young i play tennis with my sister.i will work harder on my english from now on.i wanna be a driver in the future.

I will be a professional basketball player eight years later.

A few years laterYears laterAfter a couple of years Several years later都可以的哦希望帮到楼主，O(∩_∩)O哈！

in the next eight years