Answer:
Gate, boys, dogs
Step-by-step explanation:
A common noun is a noun that is a non-specific person, place, or thing. First, we need to pick out all of the nouns from that sentence.
Gate, boys, dogs
Next, we need to check if any of these nouns are proper. If they are, we can remove them. Since none of the nouns are proper, we get our final answer.
The common nouns are gate, boys, and dogs.
Hopefully this helps!