Singular subjects joined by or or nor require a singular verb.
Either Spencer or Laura is expected to attend the meeting.
Note: Sometimes one of the subjects joined by or or nor is singular and one is plural;the verb should agree with the subject closer to the verb.
Neither his complaints nor his attitude was the reason I changed my mind.
(The singular subject attitude is closer to the verb; therefore, the singular verb was is used to agree with attitude.)
(From Write for Business, page 261, and Proofreader's Guide PDF, page 73)





Comments
Post has no comments.