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Lesson 21: Sentences

In this section, we will be discussing the definition of a sentence along with the different types of sentences.


  • To define what a sentence is
  • To discuss the different types of sentences
  • To demonstrate the different sentences using examples

A sentence is defined as a statement which expresses one complete thought. It can be made up of words, phrases and clauses. A sentence containing more than one train of thought is called a run-on sentence. Sentences are categorized according what they wish to convey—they can either be declarative, interrogative, imperative or exclamatory. In this lesson, we’ll be taking a look at all of these four sentences and how they’re used.


Declarative sentences are used to simply report or state things. They are used to declare something.


The sun is setting.

The moon is full.

There is a cup on the table.

She is my friend.

I like going to school.


Interrogative sentences ask—they are also called questions. They are punctuated with question marks.


Is she your friend?

Did you mean that?

What did she say?

Can I have one?

Do you want to go to the mall?


An imperative sentence is a sentence that commands.


Get me a sandwich.

Take that home.

Please give me information on your mother.

Bring me a glass of Kool-Aid.

Make me a mojito.


An exclamatory sentence is a sentence that conveys strong emotion. It is often punctuated by an exclamation point.


I’m so happy you’re here!

I can’t believe you went there!

Oh my goodness!

I’m so angry at her!

I can’t believe she would do something like that!

In this lesson, we studied sentences. We took up the four different kinds of sentences and how they’re used to express our thoughts. We looked at examples and were able to observe the different ways in which they’re used. We also learned that sentences consist of complete ideas—they are the fundamental unit of communication in English.

We’re now officially done with our basic grammar class. Keep reading for a recap of everything we’ve learned so far. Up next is the conclusion to our class on basic English grammar.




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