There are many parts of a sentence that you would have learned in about in school. Some of them are common and easy to remember like nouns, verbs and adjectives etc. but there are some that we forget about. We still use them in our daily life speaking and writing, but when the time comes to recognize and pinpoint them in a sentence, we find ourselves gawking for some hint. One such part of speech and sentence is conjunction.
The word conjunction is a synonym of joiner or combiner which means that it joins or combines two other parts of speech. By definition, a conjunction is a word in a sentence that forms a relationship between two other words, phrases or clauses by joining them together.
He is smart and handsome.
Take this example for instance, the word and is used to join two words (adjectives) i.e. smart and handsome in such a way that they form a relationship with each other and the subject. Thus and is a conjunction is above example.
The simplest and most commonly used type of conjunction is the coordination conjunction. When the conjunction links grammatically equal words or phrases together in a sentence, they are usually termed as coordination conjunctions. One of the main characteristic of coordination conjunction is that it comes in between the words or phrases that it links and this is one way of remembering them as well.
In the above example, the word so forms a relationship between two clauses the journey was so long and I brought along two bottles of water. Thus the conjunction so will be categorized as a subordination conjunction. Also notice that comma that is placed before the conjunction.
Now the same example is used with another subordination conjunction i.e. as. In this example, the subordination conjunction occurs at the beginning of the sentence and not in the middle of the clauses.