What is a prepositional phrase and what is a participial phrase?
Another nice question it is.
Just keep in mind, a phrase is a group of words even two words can make a phrase.
New book==adjective phase.
When a group of words starts with a preposition but ends with a noun, it is called a prepositional phrase.
on the floor, it is a preposition phrase.
Boring lecture--it is a participle phrase.
Participle always functions in a sentence like an adjective.