Sentence Types and Functions
Sentence Types and Functions
Every sentence has a job. Some sentences tell something. Some ask something. Some give a command. Some show strong feeling.
When we know the type of a sentence, we can understand what the writer or speaker wants to do. This is called the sentence’s function, or purpose.
There are 4 main sentence types you need to know:
- Declarative — tells a fact, idea, or opinion
- Interrogative — asks a question
- Imperative — gives a command or makes a request
- Exclamatory — shows strong feeling
Let’s learn each one.
1. Declarative Sentences
A declarative sentence tells something. It can share a fact, an idea, or an opinion.
Declarative sentences end with a period .
Examples:
- The dog is sleeping.
- I like apple slices.
- My brother rides the bus.
Function: to tell or explain.
2. Interrogative Sentences
An interrogative sentence asks a question.
Interrogative sentences end with a question mark ?
Examples:
- Where is my backpack?
- Do you want to play?
- What time is lunch?
Function: to ask.
3. Imperative Sentences
An imperative sentence tells someone to do something. It can be a command or a polite request.
Imperative sentences usually end with a period . Sometimes, if the speaker sounds very strong, they can end with an exclamation mark !
Examples:
- Please close the door.
- Wash your hands.
- Watch out!
Function: to tell, ask, or direct someone to do something.
4. Exclamatory Sentences
An exclamatory sentence shows strong feeling, such as surprise, excitement, joy, or anger.
Exclamatory sentences end with an exclamation mark !
Examples:
- What a huge pumpkin!
- I am so excited!
- That was an amazing game!
Function: to show strong feeling.
How to Tell the Difference
You can figure out the sentence type by asking, “What is this sentence doing?”
- If it tells, it is declarative.
- If it asks, it is interrogative.
- If it commands or requests, it is imperative.
- If it shows strong feeling, it is exclamatory.
The ending punctuation can help too:
- Period . → often declarative or imperative
- Question mark ? → interrogative
- Exclamation mark ! → exclamatory, and sometimes imperative
Important Tip: Do not look only at the punctuation. Think about the sentence’s job too.
For example:
- Please sit down. → imperative, because it asks someone to do something
- What a fun day! → exclamatory, because it shows strong feeling
Worked Example 1: Finding the Type
Sentence: The cat is under the table.
- Does it tell, ask, command, or show strong feeling?
- It tells where the cat is.
- It ends with a period.
Answer: This is a declarative sentence.
Worked Example 2: Finding the Type
Sentence: Can you help me carry these books?
- Does it tell, ask, command, or show strong feeling?
- It asks a question.
- It ends with a question mark.
Answer: This is an interrogative sentence.
Worked Example 3: Choosing the Best Type
You want your friend to open the window.
Which sentence type should you use?
- You are not just telling something.
- You are asking or directing someone to do something.
- That means you need an imperative sentence.
Example answer: Please open the window.
Worked Example 4: Changing the Function
Look at how the same idea can be written in different sentence types.
- Declarative: The cake smells good.
- Interrogative: Does the cake smell good?
- Imperative: Smell the cake.
- Exclamatory: The cake smells so good!
Each sentence is about the cake, but each one has a different purpose.
Common Mistakes to Watch For
- Mistake 1: Thinking every sentence with an exclamation mark is exclamatory. Some are imperative, like Stop!
- Mistake 2: Looking only at the last mark. Always ask what the sentence is doing.
- Mistake 3: Forgetting to match the sentence to your purpose. If you want to ask, use an interrogative sentence.
Let’s Review
- Declarative sentences tell something and end with a period.
- Interrogative sentences ask something and end with a question mark.
- Imperative sentences command or request something and usually end with a period.
- Exclamatory sentences show strong feeling and end with an exclamation mark.
When you write, think about your purpose first. Do you want to tell, ask, command, or show feeling? Then choose the sentence type that fits best.
Put what you read to the test
You've worked through Sentence Types and Functions. Try answering a few questions to see what stuck — and what might deserve a quick reread before you move on.