Sentence or not?

Is it a sentence?

The big red apple

• yes

• no

Is it a sentence?

I like pizza.

• yes

• no

Is it a sentence?

The cat is running.

• yes

• no

Is it a sentence?

jumps up very high.

• yes

• no

Is it a sentence?

My hair

• yes

• no

Is it a sentence?

A boy sits down.

• yes

• no

Is it a sentence?

My little fluffy cat

• yes

• no

Is it a sentence?

I go to school.

• yes

• no

Is it a sentence?

running fast to the store

• yes

• no

Is it a sentence?

My friend is singing.

• yes

• no