Can some one tell me if my examples are correct or if I need to do them over?

Adjectival prepositional phrase:
I like playing basketball at the gym every other weekend.

Post noun modifier:
I like the sun when it is bright and hot in July.

Participial Phrase:
I dislike buying an item at the store to find a damaged item when opened.

Adjective clause:
I dislike watching baseball games, which are not even close in scoring.

2 answers

Adjectival prepositional phrase:
I like playing basketball at the gym every other weekend. If you mean "at the gym" that's incorrect -- it's being used adverbially (telling where).

Post noun modifier:
I like the sun when it is bright and hot in July. Looks good.

Participial Phrase:
I dislike buying an item at the store to find a damaged item when opened.
Which words make up the prepositional phrase?

Adjective clause:
I dislike watching baseball games, which are not even close in scoring.
Looks OK.
Adjectival prepositonal phrase:
I like in our house the big kitchen to cook in. (in our house is the adjectival prepositonal phrase)

Participal Phrase:
I dislike ordering an item online to find a damaged package when it arrives. (damaged package is the participal phrase)