 Re: subject-verb agreement
I was referring the rule from Manhattan GMAT Sentence Correction book which has to say this on the matter:
The word and can unite two or more singular subjects, forming a compound plural subject. For example:
Joe and his friends ARE going to the beach.
Mathematics, history and science ARE required high school subjects.
Thumb rule is if the subject is plural, verb has to be plural. Here the subject dog and a cat is plural, hence verb has to be plural. |