Several Years Experience Grammar. Typing the construction into Google doesn't help. It is "five years of experience" with no apostrophe.
English Grammar rules Ten years experience or ten year's experience. The other tip that helps one avoid confusion over where to place the apostrophe in singular v. My high school has a house in France, so for our school trips we would go to France every year.
Then find out all the Many teachers find that teaching ESL grammar is difficult because they lack experience in doing so She's worked as a CELTA trainer for over five years and has been teaching English much longer than that.
A time expression is usually necessary.
Lynne Truss brings this point up (along, you imagine, with a delicate smattering of rabid froth) in her book Eats, Shoots. My son has been sick since Monday. Wow, like I've studied Thai because I lived in Thailand for five years, and like you I've studied Japanese, but my Japanese is terrible.