Some tips for using subject-verb agreement properly include using singular subjects with singular verbs and plural subjects with plural verbs. It is also important to use give consideration to indefinite pronouns, as some require singular verbs, while others require plural verbs.
When using a singular subject, a singular verb is required, e.g., "My neighbor is a doctor." When the subject is plural, the verb must also be plural for proper subject-verb agreement, e.g., "My friends are vegetarians." Indefinite pronouns requiring singular verbs include "everyone," "someone," "anyone," "no one" and "nobody," while the indefinite pronouns "all" and "some" may be singular or plural, depending on what it is they are referring to.