Capital Letters have 2 functions:

Main clauses are parts of a long sentence, which can be made into simple sentences as they make sense alone.

Subordinate clauses are parts of a long sentence, which add extra information to the main clause. Subordinate clauses do not make sense alone, if they are removed from the original sentence.

A simple sentence is the basic building block in the English language. All sentences contain a subject, a verb and have to make sense.

They can be turned into main clauses if extra information is added to it after a conjunction.

Compound sentences are two simple sentences joined by a conjunction or two main clauses joined by a co-ordinating conjunction.

Complex sentences are made up of a main clause, followed by subordinating or co-ordinating conjunctions and clauses.

There are four types of sentence. Questions is one of them.

We ask a question when we need information from someone. When we write a question, we end the sentence with a question mark instead of a full stop.

There are four types of sentence. Statements are one of them.

Quite simply a statement is a sentence, that is either written or said. They usually declare a fact and end in a full stop. They are sometimes called declarative sentences.

There are four types of sentence. Exclamations is one of them.

We make an exclamation when we are surprised, angry, shocked or scared. When we make an exclamation, our voices rise. We indicate this in our writing by adding an exclamation mark at the end of our sentence, instead of a full stop.

There are four types of sentence. Commands are one of them.

A command is a bossy sentence. We use a command when we are telling people what to do, or we are giving instructions or orders. Commands contain ‘bossy verbs’ or ‘imperative verb’. These are usually located at the beginning of a sentence.