Grammar and Language Workbook

S
OLUTION
B
Theirs is the trophy in the center of the display case.
With any of the possessive personal pronouns, do not use an
apostrophe.
P
ROBLEM
5
Confusing its with it’s
poss
The computer is booting up; I see it’s power light blinking.
poss
Its going to be a great victory party.
S
OLUTION
The computer is booting up; I see its power light blinking.
It’s going to be a great victory party.
It’s is the contraction of it is, not the possessive of it.
More help with apostrophes
and possessives is available in
Lessons 3 and 92.
Need
More
Help?

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Missing Commas with Nonessential Elements
42 
Grammar and Language Workbook, Grade 12
Copyright © by Glencoe/McGraw-Hill
T
roubleshooter
P
ROBLEM
1
Missing commas with nonessential participles, infinitives, 
and their phrases
com
Lois scowling fiercely turned her back on Clark.
com
The detective mystified by the fresh clue scratched his head in
bewilderment.
com
Television to tell the truth just doesn’t interest me.
S
OLUTION
Lois, scowling fiercely, turned her back on Clark.
The detective, mystified by the fresh clue, scratched his head in
bewilderment.
Television, to tell the truth, just doesn’t interest me.
If the participle, infinitive, or phrase is not essential to the meaning of
the sentence, set off the phrase with commas.