Speak, Talk, Say, Tell

[Jupiter]

Hi teachers,

I'm often confused about how to use those four words.
I can't tell the difference between:
say sth, tell sb sth, talk about sth or speak about sth, etc.

Could you enlighten me about it?

Thanks in advance

Jupiter

[Jamie (K)]

Why don't you give us examples of specific things that have confused you, so that we can focus our help better.