A pronoun can take different forms or cases, depending on its role in a sentence.
Subject or subject complement: I, we, you, he, she, it, they (subjective form)
Object of a verb or a preposition: me, us, you, him, her, it, them (objective form)
Possession or ownership: mine, ours, yours, his, hers, theirs, my, our, your, her, its, their (possessive form)
See R2-a for more on pronouns.
Replace a reflexive pronoun that does not refer to another noun or pronoun in the clause.
A reflexive pronoun does not belong in this sentence because myself does not refer to a preceding I.
Change a pronoun to the subjective form if it is part of a compound subject.
Change a pronoun to the objective form if it is an object (or part of a compound object) of a preposition or a verb.
Change a pronoun to the possessive form when it modifies a gerund.
Change the form of a pronoun to fit the implied or understood wording of a comparison using than or as.
Test whether a pronoun form fits by filling in the implied wording.
H-
Use we to precede a subject, or us to precede an object.
We is the subjective form, and us is the objective form. Select the form that matches the role of the noun in the sentence.
Test your choice of pronoun by reading the sentence with the noun left out.