A prepositional phrase consists of a preposition, its object, and any words that modify the object. Prepositional phrases typically modify verbs or nouns, called adverbial or adjectival phrases respectively. Some common prepositions are to, of, about, at, before, after, by, behind, during, for, from, in, over, under, and with. Prepositional phrases acting on nouns are adjectival, while those acting on verbs are adverbial. Less frequently, prepositional phrases can function as nouns.

2.  A prepositional phrase is a group of words consisting of a preposition, its
object, and any words that modify the object. Most of the time, a
prepositional phrase modifies a verb or a noun.These two kinds of
prepositional phrases are called adverbial phrases and adjectival phrases,
respectively.
 Some of the most common prepositions that begin prepositional phrases
are to, of, about, at, before, after, by, behind, during, for, from, in,
over, under, and with.

3.  When a prepositional phrase acts upon a noun, we say it is
behaving adjectivally because adjectives modify nouns.A
prepositional phrase that behaves adjectivally is called, quite
logically, an adjectival phrase.
Examples
 The cat in the middle is the cutest.
 I always buy my milk from the convenience store on Main
Street .
 My mother has always wanted to live in a cabin by the lake .

4.  When a prepositional phrase acts upon a verb, we say it is
behaving adverbially because adverbs modify verbs. A
prepositional phrase that behaves adverbially is called
an adverbial phrase.
Examples
 To find the person who stole the last cookie, look behind
you.
 Harry drank his Butterbeer with fervor.

5.  Less frequently, prepositional phrases can function like
nouns in a sentence.
Example
 During the national anthem is the worst time to blow your
nose.
 After the game will be too late for us to go to dinner.

6.  I gave the children pizza ______________ pancakes for breakfast
today.
 Instead of
 Because of
 Any more
 __________________ the chair sat mouldering in the attic.
 Sad to say,
 For one hundred years
 Incredibly

7.  1 -Answer: A.There are lots of birds nesting under the eaves.
 2 -Answer: A. After school, the children played tag at the park.
 3 -Answer: C. Come into the store with me
 4 -Answer: A. I gave the children pizza instead of pancakes for
breakfast today.
 5 -Answer: B. For one hundred years the chair sat mouldering
in the attic.