He likes to swim. He wishes he (would / could) near the sea.

[abo.omar]

He likes to swim. He wishes he (would / could) live near the sea.
The answer is (could).
The reason is that as long as the subject before 'wish' is the same as after 'wish' we should use only could.
Is such a rule right?
Can you give me more sentences about others' wishes?

 

[GoesStation]

It's not a natural sentence. I wouldn't use it as a model for a rule. However, it wouldn't make sense for someone to "wish he would swim near the sea." I might wish he would go away (for example), but he would wish he could​ (i.e., had the opportunity to) swim near the sea.

Unless he's actually swimming in the sea or can at least see it from where he's swimming, it doesn't make much difference what location he's near when he's swimming.