+345.+ +Co-ordinate conjunctions are also used to connect clauses of
equal rank.+ For example:
_The floods came and the winds blew._
Each of these clauses is a complete sentence in itself, but they are
combined into one compound sentence by the use of the co-ordinate
conjunction, _and_. Clauses united in this way may have a compound
subject and a compound predicate, but two complete clauses must be
united by a co-ordinate conjunction in order to form a compound
sentence. For example:
The rain and snow fell, _and_ the wind blew a mighty gale.
Here the first clause in the compound sentence, _the rain and snow
fell_, contains a compound subject, _rain and snow_.
The boys are running and shouting, _and_ the girls are gathering
flowers.
Here the first clause has a compound predicate, _are running_ and
_shouting_. The second _and_ connects the two clauses forming the
compound sentence.