The Adjective Clause
Recognize an adjective clause when you see one.
An adjective clause—also called an adjectival or relative clause—will meet
three requirements:
First, it will contain a subject and verb.
Next, it will begin with a relative
pronoun [who, whom, whose, that, or which] or a relative
adverb [when, where, or why].
Finally, it will function as an adjective, answering the
questions What kind? How many? or Which one?
The adjective clause will follow one of these two patterns:
RELATIVE PRONOUN OR ADVERB + SUBJECT + VERB
RELATIVE PRONOUN AS SUBJECT + VERB
Here are some examples:
Whose big, brown eyes pleaded for another cookie
Whose = relative pronoun; eyes = subject; pleaded = verb.
Why Fred cannot stand sitting across from his sister Melanie
Why = relative adverb; Fred = subject; can stand = verb [not, an adverb,
is not officially part of the verb].
That bounced across the kitchen floor
That = relative pronoun functioning as subject; bounced = verb.
Who hiccupped for seven hours afterward
Who = relative pronoun functioning as subject; hiccupped = verb.
Avoid writing a sentence fragment.
An adjective clause does not express a complete thought, so it cannot
stand alone as asentence. To avoid writing a fragment, you must connect
each adjective clause to a main clause. Read the examples below. Notice
that the adjective clause follows the word that it describes.
Diane felt manipulated by her beagle Santana, whose big, brown
eyes pleaded for another cookie .
Chewing with her mouth open is one reason why Fred cannot
stand sitting across from his sister Melanie .
Growling ferociously, Oreo and Skeeter, Madison's two dogs,
competed for the hardboiled egg that bounced across the kitchen
floor.
Laughter erupted from Annamarie, who hiccupped for seven
hours afterward.
Punctuate an adjective clause correctly.
Punctuating adjective clauses can be tricky. For each sentence, you will
have to decide if the adjective clause is essential or nonessential and then
use commas accordingly.
Essential clauses do not require commas. An adjective clause is essential
when you need the information it provides. Look at this example:
The vegetables that people leave uneaten are often the most
nutritious.
Vegetables is nonspecific. To know which ones we are talking about, we
must have the information in the adjective clause. Thus, the adjective
clause is essential and requires no commas.
If, however, we eliminate vegetables and choose a more specific noun
instead, the adjective clause becomes nonessential and does require
commas to separate it from the rest of the sentence. Read this revision:
Broccoli, which people often leave uneaten, is very nutritious.