An object of a preposition is a noun or a pronoun that
comes after a preposition, such as in,
at, of to, by, behind, on, and so on, to form a prepositional phrase.
(After his exams) Tom will take a trip (by boat).
This sentence contains two objects of prepositions. Exams is the object of the preposition after and boat is the object of the preposition by.
An object of a preposition can
cause confusion in the Structure section of the TOEFL test because it can be
mistaken for the subject of a sentence.
Example
With his friend _________ found the movie theater.
(A) has
(B) he
(C) later
(D) when
In this example you should look first for the
subject and the verb. You should notice the verb found and should also notice that there is no subject. Do not think
that friend is the subject; friend is the object of the preposition with, and one noun cannot be both a
subject and an object at the same time. Because a subject is needed in this
sentence, answer (B), he, is the best
answer. Answers (A), (C), and (D) are
not correct because they cannot be subjects.
The following chart outlines the key information that you
should remember about objects of prepositions:
OBJECTS OF
PREPOSITIONS
A preposition is followed by a noun or pronoun that is called an object of the preposition. If a word is an object of a
preposition, it is not the subject.
Please watch the following link for more explanation
Past participles can cause confusion in the Structure
section of the TOEFL test because a past participle can be either an adjective
or a part of the verb. The past participle is the form of the verb that appears
with have or be. It often ends in -ed,
but there are also many irregular past participles in English.
When you have two clauses in an English
sentence, you must connect the two clauses correctly. One way to connect two
clauses is to use and,
but, or, so, or yet between the clauses.
Tom is singing, and Paul is dancing.
Tom is tall, but Paul is short.
Tom must write the letter, or Paul will do it.
Tom told a joke, so Paul laughed.
Tom is tired, yet he is not going to
sleep.
In each of these examples, there are two clauses that are
correctly joined with a coordinate conjunction and, but, or, so, or yet, and a comma (,).
Adverb clauses can express the ideas of time and cause, as you saw in Skill 7; adverb clauses can also express a number of other ideas, such as contrast, condition, manner, and place. Because these clauses are adverb clauses, they have the same structure as the time and cause clauses in Skill 7. Study the following examples:
I will leave at 7:00 if I am ready.
Although I was late, I managed to catch the train.
In each of these examples, there are two clauses that are correctly joined with adverb connectors. In the first sentence the adverb condition connector if comes in the middle of the sentence. In the second sentence the adverb contrast connector although comes at the beginning of the`sentence, and a comma (,) is used in the middle of the sentence.
A noun clause is a clause that
functions as a noun; because the noun clause is a noun, it is used in a
sentence as either an object of a verb, an object of a preposition, or the
subject of the sentence.
In the first
example there are two clauses, I know and
he will arrive. These two clauses are
joined with the connector when. When changes
the clause he will arrive into a noun
clause that functions as the object of the verb know.
In
the second example the two clauses I am
concerned and he will arrive are
also joined by the connector when. When changes
the clause he will arrive into a noun
clause that functions as the object of the preposition about.
The
third example is more difficult. In this example there are two clauses, but
they are a little harder to recognize. He
will arrive is one of the clauses, and the connector when changes it into a noun clause that functions as the subject of
the sentence. The other clause has the noun clause when he will arrive as its subject and is as its verb.