Yes.
Use appoints with singular subjects eg
He -- He appoints all the staff.
She -- She appoints her own staff.
Singular noun -- The doctor appoints his own staff.
For all other subject s use appoint:
They appoint the staff that work on the project.
The doctors appoint their own nurses.
That is the correct spelling for "appoints", the present tense, third-person singular, of the verb to appoint.
No, "has" is a singular verb.
A singular subject always has a singular verb.
As an auxiliary verb will is without number: He will go; they will go. As a main verb, it may be singular or plural: I will this to my heirs; they will it to their heirs.
Yes, it is. It is conjugated with He, She or It.
A verb of being = singular past tense be verb.
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 verb reviewed is used after both singular and plural nouns.
Does is the third person singular form of the verb do. Does is used with singular noun or pronoun subjects.
Sees A singular verb has the form - verb + s. walk does not have + s shirts has + s but it is not a verb it is a noun. fly is a verb but it does not have + s sees is a verb it is see + s
It's a verb so it can't really be singular or plural, but it has to be the verb of a singular subject.
"looks." E.g.*, "He looks parched." *e.g. stands for "exempli gratia" which means "for example" in Latin. :)