What parts of grammar are the words?

Yesterday is history. Tomorrow is a mystery. Today is a gift, which is why we call it the present.
Yesterday?
Tomorrow?
gift?
call?
it?
present?

My brother was discharged and will follow up next week.

My?
will follow up?

2 answers

To start:
Yesterday is a noun, the subject of the verb is.

What parts of speech do you think the other words are?

I'll be glad to check your answers.
thank you!