Question

He came over the hill and through the garden.

The prepositional phrase(s) is/are _____.

he came

over the hill

he came over

through the garden

the garden

Answer 1

1~ over the hill.

2~ through the garden.

Answer 2

There are two prepositional phrases here: over the hill is the first one, and the second one is through the garden.
Prepositional phrases, as the name itself says, are phrases which start with a preposition. So in order to find prepositional phrases in a sentence, you first need to locate the prepositions. In the sentence above, the prepositions are over and through, which means that the words which follow them make a phrase with them.