Can elaborate more the word do, does, and did?

[Merella]

I`m having a hard time to know how to use the word do, does and did? Can you kindly elaborate more on how to use do, does and did? Thanks, i really appreciate it.

[Conchita]

Hello, Merella, and welcome aboard!

Your question is too vague -- that’s probably why it has remained unanswered so far.

Do: present simple for I, you, we, they
Does: present simple for he, she, it
Did: past simple; same form for all persons

I'm aware this is too succinct and incomplete, but I'm at a loss as to what exactly you are asking.

Dictionaries provide exhaustive examples for the use of the verb.

http://dictionary.cambridge.org/results.asp?searchword=do