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Sentence Correction: Preposition and Idiom Questions - Overview

Which of the following is NOT a preposition?

About is a preposition as it can link two parts of a sentence.

Example: John cares about Jane.

In this example, the preposition about links the verb cares with the object Jane.

Of is a preposition as it can link two parts of a sentence.

Example: John thinks of Jane. 

In this example, the preposition of links the verb thinks with the object Jane.

On is a preposition as it can link two parts of a sentence.

Example: John turned on the TV. 

In this example, the preposition over links the verb turned with the object the TV.

Correct!

An is an article. It indicates the number of the following noun (umbrella) in the sentence:

Jane wants to get an umbrella.

about
of
on
an