Questions about example sentences with, and the definition and usage of "Inf"

A: It means that there's a good chance that the person will do such thing.

She's likely to get that job. (She will probably get that job)

I'm likely to move to Japan next year. (There a good chance I'll move to Japan next year)

This room is not likely to fit 20 people (you probably can't fit 20 people in this room)

A: I used to go swimming - I habitually went swimming or I went swimming regularly.
I was used to going swimming meant that you became accustomed to going swimming

A: "could do" is present tense. For example, "I could do my homework right now."

"could have done" is past tense. For example, "I could have done my homework yesterday."

A: For polite requests:

You don't happen to know the time, do you?

Something that occurs by chance:

I just happened to be in town and thought I would come and say hello.