It should be hyphenated when it's used as an adjective.
Yes it should be hyphenated.
Yes it should be hyphenated.
Yes, it should be hyphenated.
Yes it should be hyphenated.
yes check-up should be hyphenated
It should be hyphenated.
"Field" is not hyphenated.
Yes it should be hyphenated.
No it shouldn't be hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.