When Hannah fell in love with Nigel

[Bassim]

I am wondering if my sentence is grammatically correct.

When Hannah fell in love with Nigel, her friends warned her off him because he was frequently unfaithful.

 

[teechar]

When Hannah fell in love with Nigel, her friends warned her [STRIKE]off[/STRIKE] about him because he'd been often [STRIKE]was frequently[/STRIKE] unfaithful in his previous relationships.

.

 

[emsr2d2]

I find teechar's word order somewhat unnatural in "... he'd been often unfaithful". I'd use "... he'd often/frequently been unfaithful in the past".
Saying that her friends "warned her off" is OK in BrE.

 

[teechar]

I find teechar's word order somewhat unnatural in "... he'd been often unfaithful". I'd use "... he'd often/frequently been unfaithful in the past".

I would use either.

Saying that her friends "warned her off" is OK in BrE.

I must say that I find "warned her about him" more natural than "warned her off him."

 

[emsr2d2]

There's a slight difference in meaning between "warn about" and "warn off" though. With the first, her friends might just say "We think you ought to know that he's been unfaithful in his last few relationships". With the second, they would say "We really think you shouldn't date him. Stay away from him. He's a serial cheat!"

 

[Tdol]

How about because he was known to be unfaithful?