What is a phrase?
A phrase is a group of words. They are not full sentences and therefore don’t make sense on their own. They do not contain verbs.
E.g the viscous dog
the vast ocean
over the hill
There are many types of phrases:
Adverbial phrases and prepositional phrases are very often the same thing!
Prepositional phrases are either noun phrases or adverbial phrases.
E.g He lost it in the castle.
Not all adverbial phrases are prepositional phrases though!
E.g He ran extremely cautiously.