Subjects and verbs must agree in number. Subject is in Yellow bold , Verb is underlined

1. If the subject is singular, the verb must be singular too.
   Example: She writes every day.
   Exception: When using the singular 'they', use plural verb forms.
   Example: The participants expressed satisfaction with their job.
   They are currently in a managerial role at the organization.
2. If the subject is plural, the verb must also be plural.
   Example: They write every day.
3. When the subject of the sentence is composed of two or more nouns or pronouns connected by and, use a plural verb.
   Example: The doctoral learners and the committee members write every day.
   Example: The percentage of employees who called in sick and the number of employees who left their jobs within two years are reflective of the level of job satisfaction.
4. When there is one subject and more than one verb, the verbs throughout the sentence must agree with the subject.
   Example: Interviews are one way to collect data and allow researchers to gain an in-depth understanding of participants.
   Example: An assumption is something that is generally accepted as true and is an important consideration when conducting a doctoral study.
5. When two or more singular nouns or pronouns are connected by 'or' or 'nor', use a singular verb.
   Example: The Chairperson or the CEO approves the proposal before proceeding.
6. Non-countable (or uncountable) nouns take a singular verb.
   Example: Education is the key to success.
   Example: Diabetes affects many people around the world.
   Example: The information obtained from the business owners was relevant to include in the study.
   Example: The research I found on the topic was limited.
7. Some countable nouns in English, such as 'earnings', 'goods', 'odds', surroundings', 'proceeds', 'contents', and 'valuables', have a plural form and take a plural verb.
   Example: The earnings for this quarter exceed expectations.
   Example: The proceeds from the sale go to support the homeless population in the city.
   Example: Locally produced goods have the advantage of shorter supply chains.
8. In sentences beginning with 'there is' or 'there are', the subject follows the verb. Since 'there' is not the subject, the verb agrees with what follows the verb.
   Example: There is little administrative support.
   Example: There are many factors affecting teacher retention.
9. Collective nouns are words that imply more than one person but are considered singular and take a singular verb. Some examples are 'group', 'team', 'committee', 'family', and 'class'.
   Example: The group meets every week.
   Example: The committee agrees on the quality of the writing.
10. Prepositions, articles, and possessives are always followed by nouns or gerund form of the verbs.
    Example: He is keen on moving to Harper.
    Example: I am thinking about doing the job.
11. 'To be', 'being', 'having', 'getting', etc., are generally followed by the past participle form of the verbs and other adjectives.
    Example: Being tired, he took some time off from work.
    Example: He became astonished being robbed in the daylight..
12. The base form of the verb is also used in the clauses that use the subjunctive mood. 'Some certain verbs' + the conjunction 'that' requires the next clause to use the subjunctive mood and the clause uses the base form of the verb in it.
    Example: He insisted that I stay at home.
    Example: The office requires that we complete our work timely.
    Example: She commanded that he stop making excuses for being late.