Sentence

Sentence is a group of words when express any meaning is called sentence.

                                   Example: I am a student. 

 I, am, a, student are particular words but when they use in format and express meaning that called sentence.

Note: when a group of words can not express meaning is can not be called sentence.

That means every sentence express meaning.
                           Sentence Format:                         

  Example:   I     play  football            lastday
                    sub  verb complement    modifier   


Note:Complement and Modifier are not compulsory in every Sentence  

Subject: Subject is the agent of the sentence. It can be person or thing .Subject is responsible for the action of sentence.
According to normal format of a sentence SUBJECT,place before the verb.
Note:Subject can be a single noun word or a noun phrase. 

 Example:1.She is very beautiful   
                  Subject 
                 2.John  is reading the book.
                    Subject
In example  1 and 2He ,and JOHN are subject and the place before Verb.

Example:3. The book is on the table
                  Subject
In example 3 THE BOOK is noun phrase. 

Verb: Verb follows the subject.Verb describe the action of a sentence .This is main part of a sentence.
Verbs place after the Subject Verbs can be a single words or verbs phrase.
Note:Every sentence in English must have a verb.

 Example:He eats rice.
                        Verbs
In this sentences Eats a verbs.Eats describe the action of the sentence
Example:1.I am eating rice.
                       verb phrase
In example AM Eating is verb phrase.

Complement:A complement completes the verb.It is same as subject.It is also noun or noun phrase.it is placed after the verb.
Note: Every sentence does not require a complement.
Remember that complement can not begin with preposition.A complement answer the question WHAT and WHOM.
Example:I eat rice (What do i eat?)
               They called mary yesterday(Whom did they called?)
In sentence RICE  MARY complete sentence. What I eat.

Modifier: A modifier tells the time ,Place ,or manner of the verb.modiffier can be place anywhere of the sentence.
Note:Every sentence does not require a modifier Answer the question WHEN, WHERE,HOW

Example:John bought a book at the bookstore
                                                        Modifier 

In this sentence AT THE BOOKSTORE  is modifier because 
its tell the buying place.