ne's_ and _other's_. Most of the other possessive
pronouns do not require an apostrophe.

Right: The man's hair is gray.

Right: The machine does its work well. [_It's_ would mean _it
is_.]

Right: One should do one's duty.

=g. A noun or pronoun linked with a gerund should be in the possessive
case whenever the use of the objective case might cause confusion.=

Faulty: Is there any criticism of Arthur going?

Right: Is there any criticism of Arthur's going?

Right: I had not heard of his being sick.

Right, but slightly less desirable: I had not heard of him
being sick.

Note.--In other instances than those in which clearness is involved many
good writers use the objective case with the gerund. But even in these
instances most writers prefer the possessive case.

=h. It is usually awkward and slightly illogical to attribute possession
to inanimate objects.=

Awkward: The farm's management.

Better: The management of the farm.

Awkward: The stomach's lining.

Better: The lining of the stomach.

Note.--Usage justifies many exceptions, particularly (1) expressions
that involve time or measure, _a day's work_, _a hair's breadth_, _a
year's salary_, _a week's vacation_, _a cable's length_; and (2)
expressions that involve personification, explicit or implied, _Reason's
voice_, _the law's delay_, _for mercy's sake_, _the heart's desire_,
_the tempest's breath_.

=i. A pronoun agrees with its antecedent in person, gender, and number,
but not in case.=

Right: _I, who am_ older, know better.

Right: Tell _me, who am_ older, your trouble.

Right: Many a man has saved _himself_ by counsel.

Exercise:

1. I am as old as (he, him). They may be pluckier than (we,
us). Nobody is less conceited than (she, her).

2. He gave help to (whoever, whomever) wanted it. The girls
(who, whom) they say have the worst taste are on a committee to
select the class pin.

3. Four of (we, us) boys were left without a cent. That is a
good investment for her cousin and (she, her).

4. It was (he, him). It is (they, them). The sole occupants of
the car were his chum and (he, him).

5. I had not heard of (his, him) being sick. She does not
approve of (our, us) being late to dinner. (They, them) who
labor now the Master will reward.

=Number=

=51a. _Each_, _every_, _every o