A sentence is a group of words
that make sense.

Daniel is happy.
Laura has a dog and a cat.
Sam likes to read his book because it is good.

All sentences start with a capital letter.

We are going to the zoo. There are lots of animals to see. My sister likes the monkeys.

Most sentences end with a full stop.

I like football.
Mum went shopping on Saturday.
Her dog is black and white.

Sentences that ask a question end with a question mark.

Are you happy ?
Do you like reading ?
Are you going to school today ?

Some sentences end with an exclamation mark. These sentences are usually to do with feelings and they are often short.