Dizzi3
In Question 740 - The Tourism commission has conducted surveys of hotels in the most popular resorts, with the ultimate goal of reducing the number of guests who express overall dissatisfaction with the hotels' service.
Hi
Dizzi3, this is because
who marks the start of a
separate clause.
So, whether the correct verb is
express or
expresses, depends on what
who is modifying:
i) If
who is modifying a
singular noun, then the correct verb is
expressesii) If
who is modifying a
plural noun, then the correct verb is
expressTo summarize, this question is about what
who is modifying.
At the risk of being slightly simplistic, let me state that since
guests immediately precedes
who,
who will modify
guests (plural) and hence, the correct verb is
express.
p.s. Our book
EducationAisle Sentence Correction Nirvana discusses
this concept of subject-verb agreemengt, its application and examples in significant detail. If you or someone is interested, PM me your email-id; I can mail the corresponding section.