I believe we first must begin with understanding what Grammar actually means.
Grammar is the structure of a language. It is not about what words mean but how they form and fit together. It is about how words are arranged in a sentence and provide rules that explain how they get used.
A phrase is a group of words that act as single part of a speech. It can be a noun, adjective, adverb or even a preposition.
Preposition – A word or group of words that show direction, location, or time, or introduce an object.
Let’s start with examples:
Maria’s favorite sweater was hanging from the line.
John found the sunset to be heart-stoppingly beautiful.