six month's or six-month?

[wang.cupid]

hey everyone,

which one is correct for the following sentences? six-month or six months'?

1. For this major, we offer a six-month certificate/six months' certificate.

2. You need give the landlord a deposit of six-month rent/ six months' rent.

Thanks.

 

[Raymott]

hey everyone,

which one is correct for the following sentences? six-month or six months'?

1. For this major, we offer a six-month certificate/six months' certificate.

2. You need to give the landlord a deposit of six-month rent/ six months' rent.

Thanks.

My choice in blue.
R.

 

[wang.cupid]

Thanks, my dear friend,

would you mind giving me some differences between these two expressions?

 

[Raymott]

1. For this major, we offer a six-month certificate/six months' certificate.
2. You need to give the landlord a deposit of six-month rent/ six months' rent.


The main difference between these sentences is that the first has a determiner, 'a', before the term "six month/s'". The second doesn't; "six-months'" acts as a determiner.

The following have the same meaning:
"It's a three hour walk to X."
"It's three hours' walk to X."