Significados de prepositional phrase en inglés

Change the following expressions from the prepositional phrase form to the possessive:

The +participle+ may be used as +principal word+ in a + prepositional phrase+.

Before the prepositional phrase: The boat is sailing | across the river.

The +noun clause+ may be used as +principal term+ of a + prepositional phrase+.

If it is a prepositional phrase, determine whether it is used as an adjective or as an adverb.

A noun or pronoun used as object or objective complement, or as the principal word of a prepositional phrase, is in the objective case.

An adverb clause may be contracted to a prepositional phrase having for its principal word (1) a participle, (2) an infinitive, or (3) a noun.

+Explanation+.-Theprincipal word of a prepositional phrase is here modified by a participle phrase.

(4) Pick out every phrase and determine whether it is a prepositional phrase or a verb-phrase.

+Explanation.+-Nounsused adverbially are in the objective case because equivalent to the principal word of a prepositional phrase.