Complete vs in complete sentences

Front

Complete sentence:

Back

The cat is in the hat

Front

I like the English subject.

Back

Complete sentence

Front

The mug is

Back

Incomplete sentence

Front

Do you like swimming

Back

?

Front

I have a blue backpack.

Back

.

Front

I have got a

Back

Incomplete sentence.

Front

On the table

Back

Incomplete sentence

Front

My brother is in grade 4.

Back

Complete sentence.