
b. Names of sciences and diseases take singular verbs: mathematics -
phonetics - physics - politics - economics - measles - mumps - arthritis - etc.
i. However, some of this nouns have other meanings and are used with
plural verbs:
1. Economics = “economic or financial aspects”
2. Politics = “somebody’s political beliefs”
3. Gymnastics = “mental gymnastics”
4. Ethics = “morals” or “moral principles that guide behaviour”
12. Rule of proximity: applied to correlatives “either.. or”, “neither… nor”, “not only… but
also”. The verb agrees with the head noun after “or”, “nor” or “but also”.
Either Mary or I am going to do it
Neither she nor you are ill
13. Singular subject head + modifiers “along with”, “accompanied by”, “together
with”, “including”, “in addition to”, “as well as”, the verb remains singular.
A cat, together with three dogs, was found in the garage. (the modifier does
not form part of the subject)
14. Two subjects connected by “both… and” take the plural
Both Sara and David were thought to be dead
15. When the verb refers to the same object, it remains singular
The author and lecturer is arriving tonight
16. “A number of” and “the number of” have different rules of agreement
a. “A number of” is a determiner, and takes the plural
b. “The number of” is a noun phrase, and takes the singular
17. “Of phrase” + percentage or fraction = agreement with the closest noun to the
verb.
Twenty percent of the students are working hard
Fifty percent of the book is about the war
a. If the noun is not followed by an of phrase, and the context does not help, the
singular verb is ought to be used
Twenty percent is working hard
b. If the fraction or percentage is used with or in place of a collective noun, the
verb may be singular or plural
Two thirds of the population lives / live in the fertile south
18. Plural unit words of distance, time and money are followed by singular verb
Two weeks goes fast when you are on holidays
a. Words for numbers that are singular are always used with the plural
There are many species, but only about a dozen are dangerous
19. When the subject of a sentence is a clause, the verb goes in the singular
What we need is a good night of sleep