A verb that has the form verb + -s is used with singular subjects eg
walks talks waits jumps etc -- The doctor walks to work.
Sometimes the spelling is verb + -es eg
watches catches does -- The office girl catches the bus to work.
plural
The rules for subject verb agreement are that a singular subject requires a singular verb. Plurals subjects need plural verbs. For example, the singular subjects John takes the singular verb runs, or (John runs).
A singular subject has a singular verb form.He/ she/ it/ and singular noun subjects like the boy/ my brother are singular subject and the verb form for singular subjects is verb + sHe likes ice cream. My brother likes ice cream. The dog likes ice cream.Plural subjects have a verb from with no -s.They like ice cream. The dogs like ice cream.This is true for present tense
The past tense forms of the verb "be" are "was" for singular subjects (I, he, she, it) and "were" for plural subjects (we, you, they).
The past tense of the verb "to be" is "was" for singular subjects (I, he, she, it) and "were" for plural subjects (we, you, they).
Does is the third person singular form of the verb do. Does is used with singular noun or pronoun subjects.
Had is the past tense conjugation of the verb have, it is used for both singular and plural subjects.
A verb agrees with the subject when it matches the subject in terms of number (singular or plural) and person (first, second, or third). This ensures that the subject and verb form a grammatically correct sentence.
a singular or plural verb, depending on the noun closest to the verb
Subjects and verbs must agree in number and personVerb agreement is a matching relation between subject and verb, the main rule of agreement is:singular subjects go with singular verb phrasesplural subjects go with plural verb phrases.In present tense (3rd person) - if the noun is singular the verb must have an -s. If the noun is plural the verb doesn't have an -s.The bench needs cleaning ( singular subject - bench, verb - need+s)The benches need cleaning (plural subject - benches, verb - need)The flower looks beautiful. The flowers look beautiful.Verbs have singular and plural forms only in the present tense. In the past tense there is no agreement problem as the verb doesn't change.The flower looked beautiful. The flowers looked beautiful.Be verb has plural and singular forms.Presentam - singular, with I as subject. I am ready.are - plural, with we, you, they or plural subjects. We are ready. The cars are ready.is - singular, with he,she,it or singular subjects. She is ready. The car is ready.Pastwas- singular, with I, he, she, it or singular subjects. He was ready. The car was ready.were- plural, with we, you, they or plural subjects. We were ready. The cars were ready
No the singular form of walk is walks. This is used with singular subjects (except for I) She walks to school. -- she is singular The doctor walks to work. -- the doctor is singular. I walk to work. -- I is singular but for I the base form of the verb is used
-s is added to the verb for singular subjects. eg He likes ice cream. The dog likes ice cream.