Answer:
We don't know what sentences you are referring to. You must mention them.
Explanation:
Clumps, waves are the two plural nouns.
Answer:
The sentence that has a nominative absolute is "The game now being over, the contestants quietly filed out of the room. "
Explanation:
A nominative absolute is a noun phrase that could either begin or end the sentence, this is totally independent and has no grammatical connection with the other parts of the sentence and commonly contains a participle or a participial phrase, "being over" is a participial phrase that is located at the beginning of the sentence and works as a nominative absolute.
