Joining independent clauses with coordinating conjunctions

When joining one independent clause to another, select a coordinating conjunction that logically expresses the relationship between the two clauses.			Place a comma before the coordinating conjunction to separate the independent clause from the dependent clause.
CONNECTOR	CLAUSE 1	CLAUSE 2	COMPLEX SENTENCE
FOR  reason	He couldn't go home.	He had no place to go.	*He couldn't go home , for he had no place to go.
AND  addition	I took a taxi.	She drove home.	I took a taxi , and she drove home.
NOR   and not	He didn't want help.	He didn't ask for it	He didn't want help, nor did he ask for it.
BUT   contrast	I wanted to go late.	She wanted to go on time.	I wanted to go late, but she wanted to go on time.
OR    options	She cooked dinner.	He took her out to a restaurant.	She cooked dinner, or he took her out to a restaurant.
YET   unexpected outcome	She owned a car.	She didn't know how to drive it.	She owned a car, yet she didn't know how to drive it.
SO    result	She had to go.	She called a friend to drive her.	She had to go, so she called a friend to drive her.