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?

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!

To identify the parts of grammar for each of the given words, we need to understand the different roles they play in the sentence. Let's break it down:

1. Yesterday - In the sentence "Yesterday is history," "yesterday" is functioning as a noun, specifically as a subject complement, describing what "is history."
2. Tomorrow - In the sentence "Tomorrow is a mystery," "tomorrow" is also a noun and is functioning as a subject complement.
3. Gift - In the sentence "Today is a gift," "gift" is a noun and serves as the subject complement, describing what "today" is.
4. Call - In the phrase "which is why we call it the present," "call" is a verb functioning as the action that someone performs, specifically in reference to the term "the present."
5. It - In the phrase "we call it the present," "it" is a pronoun that refers to something mentioned earlier in the statement. In this case, "it" is used to refer to "the present."
6. Present - In the phrase "the present," "present" is a noun acting as a direct object, referring to the time period being referred to.

Moving on to the second sentence:

1. My - In the phrase "My brother," "my" is a possessive pronoun indicating ownership or possession.
2. Will follow up - In the phrase "will follow up," "will" is an auxiliary verb, and "follow up" is a verb phrase. Together, they form the future tense of the verb "follow up," indicating an action that is yet to happen.

Understanding the different parts of speech and their functions in a sentence is crucial for comprehending grammar.