Conjunctions:
Subordinating Conjunctions-
A sub-ordinate Conjunction joins a sub-ordinate clause (dependent clause) to the principal clause (main clause/independent clause).
- Sub-ordinating conjunctions are used to form Complex sentences.
- In a complex sentence there are at least two clauses known as Principal clause and Sub-ordinating clause.
- There are three types of sub-ordinating clauses:
- Noun clause
- Adjective clause
- Adverb clause
The most common subordinating conjunctions are:
after, although, as, because, before, if, since, that, though (though..... , yet), till, until, unless, so that, lest, as soon as, when, whenever, where, why, how, than, whether, while etc.
(some phrases also function as subordinating conjunctions . some of the most common ones are: as if, as far as, as long as, as well as, even if, even though, so that, in order to, in order that etc. )
Sub-ordinating Clauses :
1) Noun clause :
A) Subject to a verb:
- That he is a thief, is known to all.
B) Object to a verb:
- Every teacher knows that he is an intelligent boy.
- Tell me where he is.
C) Object to a preposition:
- You must rely on what I told you yesterday.
- I did not agree to what you said.
- Pay attention to what they are saying.
D) Complement to a verb:
- The reason of his failure in the examination is that he is careless.
- My opinion is that you will get good marks.
E) Case in apposition to a Noun:
- The news, that Gandhiji was shot dead, spread all over the country like a fire.
2) Adjective Clause :
- I know the boy who came here.
- I have lost the watch that you gave me.
- The time which is lost, is lost for ever.
- This is the school where I was taught in my childhood.
- Nobody knew the reason why he was weeping.
- I do not know the time when he will come from Delhi.
Subordinating Conjunctions are classified according to their meaning :
The most common categories of Subordinating conjunctions (as an adverb clause) are:
1) Time (Adverb clause of Time)
(when, whenever, while, after, before, as soon as, since, as, till, until, no sooner....than etc.)
- When you come, I shall go there. (showing time) (will/shall will be used only in principal clause)
- Many things have happened since I saw you. (showing time)
- As soon as he heard the news of my success, he informed me. (showing time)
2) Place (Adverb clause of Place)
(where, wherever)
- Nehru was welcomed wherever he went. 
3) Condition (Adverb clause of Condition)
(if, whether, unless)
- If you work too much, You will lose your health.
- If you help me, I shall help you.
4) Manner (Adverb clause of Manner)
(as, as if, so far as, as far as)
- He talks as if (or as though) he were mad. (Showing manner)
- I will treat you as you have treated me. (Showing manner)
5) Cause (Adverb clause of Cause)
(because, as, since)
- I shall teach him because he is weak. (showing reason)
- As he was not there, I spoke to his father. (showing reason)
- He cannot walk because he is weak. (showing reason)
- I am glad that you like it. (showing reason)
6) Purpose (Adverb clause of Purpose)
(that, so that, lest, in order that)
- Walk slowly lest you should fall. 
- Passengers pushed one another so that they might enter the compartment.
7) Comparison (Adverb clause of Comparison)
(as....as, so....as, than)
- Mohan is as intelligent as Rohan (is).
- You are not so strong as I (am).
- Mohan is wiser than he (is).
8) Contrast (Adverb clause of Contrast)
(although, though, even if, however)
- Although he is poor, he is honest. 
9)Effect or Result (Adverb clause of Effect)
(that) use the adverb 'so' in first clause & start second clause using conjunction 'that'.
- He is so poor that he can not buy this book.
- He was so weak that he could not speak.
Some important point you need to know:
A Clause is a group of words that has a subject and a verb. Some clauses are independent and some clauses are dependent. Independent clauses express a complete thought while dependent clauses can't stand alone. There are some important points given that we need to know:
- An independent clause is a clause that could stand as a complete sentence on its own.
- Independent clauses are often joined via conjunctions, commas or semicolons to form compound sentences.
- Dependent clause (also known as subordinate clause) could not stand alone in a sentence.
- Dependent clauses may function as nouns (noun clauses, adjectives (relative clauses), or adverbs (adverbial clauses)






 
 
 
