Simple subject;

I have never seen a squirrel with a ukulele.

Refusing to brush their teeth, Laurie and Jannie drank more soda

I (first sentence)

Laurie, Jannie (second sentence)

Explanation:

A simple subject is the main word or words in a subject. It does not include any of the modifiers that might describe the subject or conjunctions that connect multiple simple subjects.

I is the simple subject of the first sentence.

Some sentences contain multiple simple subjects. "Laurie" is a simple subject in the second sentence, and "Jannie" is also a simple subject in the second sentence.

subject first one the second one is predicate

Explanation:

A subject is the part of a sentence that performs a verb (an action) in a sentence. The predicate is the part of a sentence that contains the verb.