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When should “to be” agree with the first noun?
With a sentence covering states, the noun typically agrees with the first noun, such as There is a car. or They are rocks.
The verb “to be” describes the noun, and therefore agrees with whether the noun is singular or plural. This can become confusing, however, when “to be” describes a singular noun that groups a plural: nouns such as couple, pair, group, and crowd may all be followed by plurals, but are treated, grammatically, as singular, as they represent one single unit.
Consider that “a couple of people” is one object (a couple), because it combines two separate objects (two people) into one unit. Similarly, “a group of doctors”, “a crowd of onlookers”, “a swarm of bees”. The opposite would be true if we defined a group by a plural number or an adverb expressing a plural: “many chairs” and “twelve nurses”, for example, express plurals that are not grouped into one unit.
Usually, the first noun defines the quantity (and tells us “how many”), and with sentences describing states the verb “to be” will agree with the first noun.
There is a group of librarians waiting for you.
There are hundreds of clowns coming. |
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