Which is the purpose of coordinating conjunctions? To connect words or phrases that have the same grammatical function in a sentence.
examples (A) Karina and her boyfriend are going to the movies. In (A): noun + and + noun (B) Marcel laughed and cried at the same time. In (B): verb + and + verb (C) These shoes are old but comfortable. In (C): adjective + but + adjective (D) I want to sleep or watch T.V. In (D): infinitive + or + infinitive
Coordinating conjunctions A parallel structure may contain more than two parts. Nick, Kevin,andJoe are coming to dinner. In a series, commas are used to separate each unit Martha raised her hand, screamed, and sang the song. The final comma that precedes the conjunction is optional; also correct. Nick, Kevin andJoe are coming to dinner.
PAIRED CONJUNCTIONS Two subjects connected by Both … and take a plural verb. Example: Both the dog and the cat are mine. When two subjects are connected by not only… but also, either…or, neither…nor. The subject that is closer to the verb determines whether the verb is singular or plural. Examples: (A)Not only my brother but also my parents are here. (B) Neithermy mother nor my sister is here. (C) I’ll go either by bus or car for my trip.
Combining independent clauses with coordinating conjunctions A conjunction may be used to connect two independent clauses. (A) He was running fast.There was a dog running after him. Usually a comma immediately precedes the conjunction. (B) He was running fast, and there was a dog running after him. In short sentences, the comma is sometimes omitted. (C) He was running and there was a dog running after him. In informal writing, a conjunction sometimes begins a sentence. (D) He was running fast. And there was a dog running after him.
In addition to and, but, or, and nor, other conjunctions are used to connect two independent clauses: So (meaning “therefore as a result”) For (meaning “because”) Yet (meaning “but, nevertheless”) A comma almost always precedes so, for, and yet when they are used as coordinating conjunctions.