What verb form should be used in: Everyone ___ for her own check?

In the sentence "Everyone ___ for her own check," the correct verb form is "signs." This is because "everyone" is treated as a singular indefinite pronoun. Therefore, it requires a singular verb to agree with it.

The present tense form "signs" is appropriate here as it implies a current or habitual action, which aligns with the intention of the sentence. When using the subject "everyone," it is important to maintain subject-verb agreement, which is accomplished by using the singular verb form "signs."

While other forms like "sign," "signed," and "signing" could grammatically fit different contexts, they do not agree with the singular subject "everyone" in this instance. "Sign" is the base form and doesn't indicate the necessary present tense. "Signed" indicates the past tense, suggesting that the action has already occurred, and "signing" is a gerund or present participle, which does not fit well in this sentence structure. Thus, "signs" is the correct choice as it properly matches the subject and maintains the present tense needed for the context.