4. A young boy played several songs on the piano during the party.
What’s the simple subject

Young boy

Explanation:

A simple subject typically refers to a person, place, or thing, who is performing an action. The simple subject is a single word representing the subject without any of its modifiers or adjectives whereas a complete subject represents the subject along with all of its modifiers or adjectives.

answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.

the complete subject is

lorna