Subject:To command is his ambition.
Predicated noun:To know is to act.
Object of verb:I prefer to travel slowly.
After nouns:We have work to do.
After verbs:He failed to pass his examinations.
He seemed to be in trouble.
Children had better be silent.
After verbs (with noun or pronoun subject):Our neighbors helped us move.
After adjectives:They are glad to hear the news.
He is so foolish as to believe the tale.

Conjunctions

It is often necessary or desirable to join together two or more similar words, elements, or clauses in a sentence. Two nouns constituting the subject, for example, may have the same assertion made about them.

Time and tide wait for no man.

And, which joins time and tide, is a conjunction.

Two adjectives, two verbs, two adverbs, two prepositional phrases, or two clauses may be joined together with a conjunction.

The flag is colored red and blue.

Time came and went.

Men and women laughed and cried.

The rains descended, and the floods came.