Subject-Verb Agreement

Many of these injuries (happens, happen)

to football quarterbacks.

• happens

• happen

One of the most serious sports

injuries (is, are) a concussion.

• is

• are

Many young people (thinks, think)

nothing of a minor blow to the head.

• thinks

• think

Now scientists (understands, understand)

these injuries much better than before.

• understands

• understand

On impact, the arteries of the brain

(is, are) constricted.

• is

• are

Some athletes unfortunately

(suffers, suffer) a second concussion

before healing from the fi rst one.

• suffers

• suffer

Several minor concussions often

(leads, lead) to permanent brain

damage or even death.

• leads

• lead

Medical doctors all over the country

(wants, want) stricter guidelines

for athletes with concussions.

• wants

• want

An athlete with one or more concussions

(requires, require) a sufficient amount

of rest.

• requires

• require

Today, nobody in contact sports

(takes, take) a head injury lightly.

• takes

• take