1. A phrasal verb is a verb combined with a preposition or adverb that creates a new meaning, such as "ran into" or "ran away".
2. Phrasal verbs can be either intransitive, not taking an object, or transitive, taking an object that can either come between the verb and preposition or after.
3. Prepositional phrases function as modifiers that provide additional information about nouns, adjectives, or verbs, or as complements that are required to complete the meaning.