Page 17 - E-module for English for Civil Engineering

D. Exercise Explanation

Please download the explanation on the assignment after you finish it.

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A. Skill 2: Be careful of object of preposition

An object of preposition is a noun, pronoun, gerund or a noun clause which comes after a
preposition, such as in, at, of, to, by, behind, on, and so on, to form a prepositional phrase. An
object of preposition can cause confusion in structure questions on TOEFL test because it can be
mistaken for the subject of a sentence

Nouns, pronoun, gerund Subject

or a noun clause =

Preposition: in, at, of, to, Nouns, pronoun, gerund ≠ Subject
+ or a noun clause
by, behind, on

After his exam Tom will take a trip by boat

After his exam and by boat are objects of preposition

Tom is the subject