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.
CORRELATIVES
346. Certain co-ordinate conjunctions are used in pairs, such as both, and; either, or; neither, nor; whether, or. These pairs are called correlatives. The first word in the pair, as, both, either, neither, or whether, is used as an assistant conjunction helping the other to do the connecting. These are used in such sentences as:
- I have both seen and heard him.
- They will join us either in April or in May.
- Labor has received neither liberty nor justice.
- Whether to go forward or to retreat was the problem.
Note that nor is always the proper correlative to use with neither and also with the negatives not and never when they apply to what follows as well as to what precedes. For example:
- There are thousands in this country who can neither read nor write.
- Neither you nor I can foretell the future.
- He will not write nor should you.
- Capital punishment is nothing more nor less than legalized murder.
- We shall never lower our colors nor retreat.
Or is always used with the correlative either. For example:
- We will either come or write you.
- Either he was mistaken or he deliberately lied.