Quick English lesson

[Swanny]

I've noticed that some of our American cousins here seem to be struggling with the English language.
There are a couple of things I think you need help with.

"I could care less."........ This means you care a bit, but could maybe care a bit less.

I think you mean to say.....

"I couldn't care less." ........ This means you could not care any less than you do now.

And I have also noticed some confusion with the words then and than.
For example "may be a lot sooner then we think!" that really should be a than in there.

He was happy then.
He fixed it, then left.
There are three green ones, then a blue one.
If it’s locked, then we’ll need the key.

You are a better swimmer than she is.
They like you more than they like her.

But no doubt you couldn't care less about what I'm saying.
In which case