Two or more Singular Subjects connected by and usually take a Verb in the Plural.
Mohan and Ram are here.
If two Singular Nouns refer to the same person or thing, the Verb must be Singular.
The Secretary and Principal is coming
(जो Secretaryहै वही Principal है)
If the Singular Subjects are preceded ( Singular Subject के पहले each or every) by each or every, the Verb is usually Singular.
Every boy and girl was ready
Two or more Singular Subjects connected by or, nor, either ….. or, neither …. nor take a Verb in the Singular.
Neither he nor I was there.
When the Subjects joined by ‘or/nor are of different numbers, the Verb must be Plural, and the Plural Subject must be placed next to the Verb.
Neither the Headmaster nor the Assistant Masters were present.
When the Subjects joined by or, nor are of different persons, the Verb agrees in person with the one nearest to it.
Either he or I, am mistaken.
Collective nouns, liketeam,family, class,group, andhost, take a singular verb when the entity acts together
The team is painting a mural.
Collective nouns, liketeam,family, class,group, andhost, take a singular verb when the entity acts together and a plural verb when collective noun seems divided
The team are in disagreement about how to paint the mural. (The people on the team disagree with one another, so the verb is plural.)
The family takes a trip to California once a year. (The family collectively takes a trip, so the verb is singular.)
The family have differing ideas about the annual trip. (The individuals in the family have differing ideas, so the verb is plural.)
Some Nouns which are plural in form but singular in meaning, take a singular Verb.
Mathematics is a branch of study in every school.
Words joined to a Singular Subject by with, together with, in addition to, or, as well as, etc. are parenthetical, and therefore do not affect the number of the Verb.
The Chief, with all his men, was massacred.
When the Subject of the Verb is a Relative Pronoun care should be taken to see that the Verb agrees in Number and Person with the Antecedent of the relative.
I, who am your friend will guard your interests.
Ask, advise, allow, command, force, forbid, invite, encourage, compel, beg, order, imagine, instruct, permit, persuade, tell, require, remind, teach, etc. are followed by Object + To +V2)
Ram advised me to do it.
Know is followed by how/ where/when/why and Infinitive. Know के बाद how/ where/when/why and Infinitive आता है
I know how to write a letter