Hello, Jenny! Thank you for passing your homework. You're doing good in
constructing sentences! Keep it up! I just have some corrections for your
sentences. Kindly read and study them. Thank you, Jenny! I'll see you in
class!

~ Teacher Mary

1. I wake up at 7:10 in the morning.

~ Correct!

2. I go to bed at 9:30 at night.

~ Your sentence is correct! Just don't forget to put a period after your
sentence.

3. My favorite subject is P.E.

Explanation: I is a subjective pronoun. A subjective pronoun is used when it 
is the one being talked about in the sentence. In your sentence, we are talking about your favorite subject and not you so we should use the possessive
pronoun My instead.  Possessive pronouns are used to show possession or
ownership.

4. My friend's favorite subject is math.

Explanation:
a. We should always start a sentence with big letters.
b. This is the correct spelling of subject.

5. I go to English class at 4:00 in the afternoon.

Explanation: Your sentence is almost correct. You should just put in the afternoon after the time so that we are sure that it is in the afternoon and
not in the morning.