Is It a Sentence?
Ran onto the playground with his friends
No. This sentence is missing a subject.
The small gray kitten ran into the barn.
Subject: The small gray kitten Predicate: ran into the barn
She laughed
Yes. The subject is She and the predicate is laughed.
My dad works at Target.
This is a statement.
The band performed for us last week.
Subject: The band Predicate: performed for us last week.
Watched a good TV show last night
No. This is NOT a sentence. It is missing a subject.
The boy in the red T-shirt
No. This is not a sentence. It is missing a predicate.