Since preposition connects nouns to pronoun similarly conjunction are the words that connect two or more clauses.
Examples (italicized and underlined words are conjunctions)
Conjunction also joins two words together, like,
Amelia and Rebecca are on the way to college.
Conjunctions are different from demonstratives or relative pronouns (this, that, those, these) and relative adverbs (where etc).
Conjunctions in pairs
Some conjunctions are used in pairs, like;
Kinds of conjunction
There are TWO types of conjunctions;
Note: you might have observed that in all the four above examples on either side of conjunction (coordinator) the clauses give complete meaning without the help of second clause, hence they are independent clauses, for example, in first sentence “He knew there was a trap” and “he avoided going there” are both independent clauses. Similarly in the second sentence “Its heavy rain today” and “I cannot go anywhere” and so on.
Now you have observed that underlined and italicized words are subordinators and they join subordinate clause to main or independent clause. If you take the first example you see that “I thought” don’t give complete meaning. You at once think “What I thought?” There is question mark in your mind and that is what we call no complete meaning. When you read the second clause “he could face the circumstances.” there is no question in your mind because the meaning it gives is complete.
What is clause
Clause is the combination of words which sometimes gives complete meaning, like sentence, and sometimes not. The clause which gives complete meanings is called independent or main clause otherwise it is subordinate or dependent clause (consider above examples of coordinator and subordinator). Main clause is different from sentence in a way that sentence has full stops [.] at both ends whereas clause has comma, conjunction or relative pronoun at either side and hence it is the part of a sentence.
Examples of sentence
Examples of clause
Kinds of sentence with respect to clauses
Kind of sentence is determined by the number of clauses and they are as follows;
Note: Red colour is used for dependent clause and blue for independent clause.