1 - When the subject is followed by a phrase, the verb agrees with the subject, not with the noun in the phrase.
2 -
For compound subject joined by AND the following rules must be followed:
Use plural verb if the noun joined by AND refer to different persons or things
Use singular verb if the noun joined by AND are spoken of as one unit in the sentence
Use singular verb if the noun joined by AND refer to only one person or thing
Use singular verb if the noun joined by AND are synonyms
Use singular verb if the noun joined by AND are modified by each, every, many a, or no.
3 - For compound subject joined by or, either or or, neither or nor, the following rules must be observed:
Use singular verb if both subject are singular
Use plural verb if both subject are plural
If one subject is singular and the other is plural, make the verb agrees
4 - Collective nouns such as team, committee, choir, crew are treated as singular when we think of
the whole group and they are treated as plural when we visualize the individual members
5 - Expressions indicating an amount of money, a space of time, or a unit of measurement take singular verbs even the form is plural.
6 - The verb agrees with the positive subject, not with the negative.
7 - A verb agrees with the subject, not with its predicate noun or pronoun.
8 - When the verb precedes the subject, the speaker must look ahead to the subject in order to decide whether the verb is singular or plural
9 - Any group of words like phrases, clauses, or quotations referring to a single thing or thought is used with a singular verb.
10 - The indefinite pronounce each, with neither, one, everyone, everybody, no one, nobody, anyone, someone, somebody, are always singular while several, few, both, many are always plural.
11— Some indefinite pronouns may be either singular or plural.
Some and most are singular when they refer to quantity. They are plural when they refer to a number.
None may be either singular or plural depending on whether the speaker is refer to ring to one thing or to several.
All used as pronoun denoting persons of objects takes a plural verb; all denoting quality takes singular verb.
12 - A relative pronoun agrees with its antecedent or word to which it refers. If the antecedent is
plural, the relative pronouns is plural and will need a plural verb. If the antecedent is singular,
the relative pronouns is singular and will need a singular verb.
13 - Adjective forms used as subject and preceded by the article "the" are plural.
14 - Nouns plural in spelling but singular in meaning take a singular verb.
15 - Do/Does/Did is followed by a verb-s.
16 - Titles of a book, song, poem or musical composition take a singular verb.
17 - Fractions take a singular verb. But if fractions are followed by an 'of phrase', the verb agrees
with the noun following of.
18 - Intervening phrases such as with, together with, as well as, accompanied by, which come
between the subject and the verb do not affect the subject. verb.
19 - Expression A NUMBER OF takes a plural verb; TH NUMBER OF takes a singular
20 - Pronouns You and I take a plural verb.
21 - Mathematical expressions may be either singular or plural depending in the idea exposed.