could-might

[aliii]

Hello,

As we know that we use could and might for 'possibility' now and future, but I don't know they are correct or not.

-You could go for a walk 2 hours later after you finish your study.

-First, you have to finish your homework so that you could go for a walk 2 hours later

-If you could go for a walk 2 hours later, you can come with us

-You could go for a walk 2 hours later after you finish your study.

-I will give you the money you need In case you could watch that film later.

My question is:Can we use these forms like that?

[SlickVic9000]

*Not a Teacher*

-- You could go for a walk 2 hours later after you finish your studies.

-- First, you have to finish your homework so that you can go for a walk two hours later.

-- If you could go for a walk 2 hours later, you could come with us.

-- (Repeat of first sentence)

-- I will give you the money you need in case you want to watch that film later.

('Could' isn't necessarily wrong, it's just not appropriate for the context. If there was something that would likely prevent you from seeing the movie, 'could' would make more sense. Though, if that were the case, I would use 'are able to'.)