Does a coordinate clause include a coordinator (/coordinating conjunction)?
"It was apple-blossom time, and the days were getting warmer."
Is "and the days were getting warmer" a coordinate clause? Or is it "the days were getting warmer" (without "and") that is a coordinate clause? Which does the coordinator "and" belong in?
In English grammar, a coordinate clause is a clause (i.e., a word group containing a subject and predicate) that is introduced by one of the coordinating conjunctions--most commonly and or but.
Practical English Usage
co-ordinate clause one of two or more main or subordinate clauses of equal 'value' that are connected. Examples: Shall I come to your place or would you like to come to mine?; It's cooler today and there's a bit o f a wind; she said that it was late and that she was tired. See also main clause, subordinate clause.