number of verb : Common Errors in English

About number of verb

In long, complicated sentences, people often lose track of whether thesubject is singular or plural and use the wrong sort of verb. “Theultimate effect of all of these phone calls to the detectives were tomake them suspicious of the callers” is an error because “effect,” whichis singular, is the subject. If you are uncertain about whether to gowith singular or plural condense the sentence down to its skeleton: “Theeffect . . . was to make them suspicious.”Another situation that creates confusion is the use of interjectionslike “along with,” “as well as,” and “together with,” where they areoften treated improperly as if they meant simply “and.” “Aunt Hilda, aswell as her pet dachshund, is coming to the party” (not “are coming”).A compound subject requires a plural verb even if the words which make it up are themselves singular in form: “widespread mold and mildew damage [not damages] the resale value of your house.”If the title of a work is in the plural, you still use a singular verb because it is just one work: “My copy of Great Expectations has the original illustrations in it.” That much seems obvious; but it might not seem quite so obvious that Plutarch’s Lives is a single work, or that Shakespeare’s Sonnets is. Of course if you are not referring to the book as a whole but to the individual poems they are “Shakespeare’s sonnets,” and take a plural verb.Amounts of money and periods of time are usually considered singular: ten dollars is not a lot of money to lend someone, and five years is a long time to wait to be repaid.
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