To find the subject of a sentence, put who or what before the verb in the sentence. The answer to this question will probably be the subject of the sentence.
- Gary sang.
Who sang?
Answer: Gary
Subject: Gary - The cat is sleeping.
Who is sleeping?
Answer: The cat.
Subject: The cat. - The eggs are in the fridge.
What is in the fridge?
Answer: Eggs.
Subject: Eggs.