Please can somebody explain when to use 'year's' and when to use 'years'? I am getting confused.

e.g. If I was to write I have a year's experience is that correct as you are only referring to one year?

Thanks in advance!

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Comments  (Page 4) 
No. I assume you are talking about the length of a piece of wood and not a foot made of wood. If the wood is two feet long, then you have two feet of wood.
Superbly answered, Thank You
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Why use the apostrophe? Because years is a possessive form.


The opinion of the group is the group's opinion.
The reputation of the man is the man's reputation.
The rivalry of the teams is the teams' rivalry.
The pay of a week is a week's pay.
The sabbatical of a year is a year's sabbatical.
The experience of five years is five years' experience.

Many people don't like the "years' experience" construction, and I don't blame them. It's odd. But it is also correct.

So, 1500 hours' flying experience or 10 years' working in IT? I don't think so.