I have the sentence...When I get home from school,I'm going to take a nap.

I am supposed to underline the subjects and verbs. I know in the first part the subject is I and the verb is get. On the second part the subject is I. I'm not sure on the verb though. Is it am going or am going to take?
Thanks..

In the second part (main clause) of that sentence, only "going" is the main verb. The infinitive "to take" is a verb form completing the thought.

what is the subject

In the sentence "When I get home from school, I'm going to take a nap," the subjects are "I" and "I'm," and the verbs are "get" and "going to take."

The verb in the first part of the sentence is "get," as you correctly identified. In the second part of the sentence, the verb is "am going to take." "Am going" together forms the present continuous tense of the verb "to go," indicating a future action, and "to take" is the infinitive form of the verb "take" that functions as the main action in the sentence.

So to summarize:
- Subject: I
- Verb: get
- Subject: I'm
- Verb: am going to take

To identify the subjects and verbs in a sentence, you need to determine who or what is performing the action (subject) and what action is being performed (verb).

Let's break down the sentence: "When I get home from school, I'm going to take a nap."

In the first part of the sentence, "When I get home from school," the subject is "I" and the verb is "get."

In the second part, "I'm going to take a nap," the subject is still "I," but the verb is a bit more complex. It consists of the helping verb "am," followed by the main verb "going to take." Together, they form the verb phrase "am going to take."

So, to answer your question, the verb in the second part is "am going to take."