First of all, we should know what is Conjunction?
Connect + Junction= Conjunction.Conjunction is a word.It joins two words, two sentences and two clauses.What’s the use of Conjunctions in English Grammar?
- Conjunction works like a connector.If it is necessary, it can extend the sentence or it can compress the sentence.So these are used to minimize or maximize the language.
 
Some of the Conjunctions:
| and | for | after | before | while | 
| But | also | if | unless | than | 
| or | still | though | as | since | 
| that | else | although | when | only | 
| for | because | till | where | 
Eg:
- Birds fly and fish swim.
 - He is slow but he is sure.
 - Unless you go there ,you don’t know what has happened there.
 - Although she is not beautiful, she wants to be a film star.
 - Is there still raining?
 - The train had left before we reached the railway station.
 
Kinds of Conjunction:
Conjunctions are divided into four kinds, namely: 
- Correlative Conjunctions.
 - Compound Conjunctions.
 - Co-ordinating Conjunctions.
 - Subordinate Conjunctions.
 
1. Correlative Conjunctions:
These are used in pairs.
Eg:
| either – or | such – that | 
| Neither – nor | as-as | 
| Both –and | as – so | 
| Though – yet | so—that | 
| Whether – or | hardly – when | 
| Not only –but also | scarcely – when | 
| Such – as | no sooner – than | 
Eg :
- Madhavi is either a typist or a teacher.[It means Madhavi is doing two jobs parallely one is Typist andTeacher].
 - She can speak neither English nor Hindi.[It means she cannot speak English and Hindi].
 - He is both handsome and clever.
 - Though he tried to convince his boss,[yet] she was not happy with his words.
 - I don’t know whether she will marry him or continue her studies. [Here, whether expresses doubt].
 - He not only wrote song but also sang it.[Here ,this conjunction denotes he wrote the song and he himself sang the song].
 - I read such books as Oxford Encyclopedia and Cambrige English Grammar to improve my knowledge.
 - Vijay is as clever as Ajay.[ Here as-as denotes vijay and Ajay are clevers].
 - As you work, so the result is.[ Here, As-so denotes our capability that is how we work that decides our success].
 - He went to Agra so that he might see TajMahal.
 - I had hardly reached home when the phone began ringing. [ In this sentence, hardly reveals that by the time he reached home, he is too tired].
 - She had scarcely returned home when someone knocked at the door. [Here also scarcely gives almost same meaning like hardly that she has just reached home].
 - we had no sooner started for Hyderabad than our uncle arrived. [In this sentence, no sooner denotes that They are about go to Hyd but by that time their uncle arrived].
 
Compound Conjunctions:
Group of words which are used as conjunctions are known as Compound Conjunctions.
Eg:
| in order that | as though | 
| On condition that | in as much as | 
| Even if | as well as | 
| So that | as soon as | 
| Provided that | as if | 
Eg:
- He applied for a job in order that he might help his parents.
 - I can lend you the money on condition that you return it in a month.
 - Even if she is beautiful, I won’t marry her.
 - He saved some money so that he might use it in future.
 - She appears as though she were a film star.[ Here, She is not a film star but she appears like that].
 - Madhavi, as well as her friend, is beautiful. [ It means both are beautiful].
 - As soon as I read the books of Dr.APJ Kalam , I became a big fan of him.[It means very soon I became a fan].
 
Co-ordinate Conjunctions:
conjunctions which are used to join together clauses of equal rank are known as Co-ordinate Conjunctions.
Eg:
 and, but,for,nor,or, also etc.
- She spoke impressively at the meeting and won the appreciation of all.
 - I offered to help her but she refused my help.
 - I must try hard for there is heavy competition.
 - He is not my friend nor my relative.
 - You must begin the work today or you will not finish it in time. [Here, or denotes if you don’t start the work, you cannot complete the work].
 
Subordinate Conjunctions:
Conjunctions which are used to join clauses ofunequal rank are known as Subordinating Cinjunctions.
Eg:
| After | although | when | 
| Because | till | where | 
| If | before | while | 
| That | unless | than | 
| Though | as | 
Eg :
He came after I had finished my work. 
- In this sentence two actions done in past.we should carefully pause the sentence otherwise it changes the meaning.
 
- He came, after I had finished my work. [ It means first I finished my work later he came].
 - He came after ,I had finished my work. [ It means first he came later I completed my work].
 
- She was sad because she lost her job.
 - If you permit me, I will come there.
 - We believe that Swami Vivekananda was a genius.
 - Although you are rich, you cannot do everything.
 - Though he is great ,he is humble.
 - Wait there till I call you.
 - Do as I tell you.
 - My brother had got job before he got married. [It means first my brother got job,later he got marriage]. before conjunction not only connects the sentences but also denotes which action is done first ,which is done next.
 - Please stay where you are.
 - She is Watching TV while I am reading.
 - She wrote the exam better than I expected.
 
