[Grammar] I wish you were/ would be...

[Iryn_]

Hello, everybody!

1. I wish/ if only you were more polite.
2. I wish/ if only you would be more polite.

3. I wish/ if only you didn't smoke.
4. I wish/ if only you would not smoke.

Could you tell, please, if all of these sentences correct and why?
Thank you!

 

[bhaisahab]

Re: I wish/ if only you ...

They are all OK with "I wish" or "If only".

 

[Iryn_]

Re: I wish/ if only you ...

Could you also explain how the meaning changes when using
were more polite/ would be more polite
in these sentences?

 

[bhaisahab]

Re: I wish/ if only you ...

There is no appreciable difference in meaning.