这个……区别挺大的 for 5 years是指五年的时间 比如我在这个位子上五年了 i've been in my position for 5 years I've worked for this enterprise for 5 years 经常和完成时连用 five years ago指的是五年前,常和过去式连用 比如 I came into my current position 5 years ago I came to this company 5 years ago本回答被网友采纳