What is Sentence?

A group of words which expresses a complete idea or thought is called a sentence.

Example 
He bought a car.

The above group of word expresses a complete idea. Such combination of words is called a sentence. 

Now, look at another group of words “book a read him”. This group of words does not make a complete sense so it cannot be called a sentence.

A sentence is a combination of words including a subject and a verb which express a complete idea. A sentence begins with a capital letter and ends with a period, question mark or exclamation mark.

Examples

             He goes to school.
             She is eating an apple.
             My name is John.
             What are you doing?
             Who are you?
             What a beautiful flower!

Kinds of Sentences

1. Declarative - A declarative sentence makes a statement. A declarative sentence ends with a period.

Example: The house will be built on a hill.

2. Imperative - An imperative sentence gives a command.

Example: Cheryl, try the other door.

Sometimes the subject of an imperative sentence (you) is understood.

Example: Look in the closet. (You, look in the closet.)

3. Interrogative - An interrogative sentence asks a question. An interrogative sentence ends with a question mark.

Example: How did you find the card?

4. Exclamatory - An exclamatory sentence shows strong feeling. An exclamatory sentence ends with an exclamation mark.

Example: The monster is attacking!

Ex.1. Classify these sentences. 

 Example: Susan is a senior. Declarative 
 Keys
 1. I wish I could go to Colorado this summer. _____ 
 2. Please set the table for lunch. _____ 
 3. The vice-president will visit Egypt next week. _____ 
 4. Don't you ever get tired of watching television? _____ 
 5. We bought our car in April, 1975. _____ 
 6. Didn't I meet you at Rainbow Lake last summer? _____ 
 7. Have you ever roasted a turkey? _____ 
 8. Ouch! I burned my finger! _____ 
 9. Turn left at the second stop sign. _____ 
 10. San Marino is the smallest republic in Europe. _____ 
 11. Initial the top right-hand corner of each sheet of paper. _____ 
 12. Richard Martin's short stories have appeared in many magazines. _____ 
 13. Have you ever read The Red Badge of Courage? _____ 
 14. You can't be serious! _____ 
 15. Meet me at seven o'clock in front of the library. _____ 
 16. Why are you so worried about the exam? _____ 
 17. Don't close your mind to the other side of the question. _____ 
 18. Nancy wants to be a doctor. _____ 
 19. I can't believe it's all over! _____ 
 20. Do you attend concerts given by the Chicago Symphony Orchestra? _____