SAT® · Reading and Writing: Form, Structure, and Sense — Verbs and Verbals
Finite Verbs versus Verbals
A finite verb has a tense and agrees with a subject, so it can run a clause on its own. A verbal (an -ing, -ed, or to-form) can't do either, so it never works alone as the main verb.
Every clause needs one finite verb to act as its engine. A finite verb is tied to a specific time: 'runs' is present, 'ran' is past, 'has been running' is present perfect progressive. It also agrees with its subject: 'the crew uncovers' not 'the crew uncover.' A verbal is a verb form that has been stripped of that time-stamp and that agreement. 'Running,' 'to run,' and 'run' (as in 'the problem run last week') carry the idea of the action but refuse to commit to when it happened or who's doing it in a way the sentence can check. That's why a verbal can never be the only verb in a clause.
To test an -ing word, ask whether it can stand alone as the complete predicate with nothing added. 'The runner sprinting' is not a sentence; 'The runner sprints' is. If you need to bolt on a helping verb like 'is' or 'was' to make it work, the -ing form was never finite to begin with. The same test catches infinitives: 'to finish' never carries tense, no matter how you dress it up. Gerunds pass a different test: they slide into noun slots, as subjects or objects, which is exactly why 'Running' can open a sentence and 'Swimming is exhausting' is fine. In 'Wanting to finish, the runner sprinting past the marker collapsed,' 'wanting' and 'sprinting' are both participles modifying 'runner,' and 'to finish' is an infinitive inside that opening phrase. 'Collapsed' is the only finite verb, so it alone carries the sentence.
This matters most in fill-in-the-blank sentence completion, where a tempting -ing or to- form sits right where a verb belongs. Spotting the one finite verb a clause needs tells you instantly whether a choice can fill that slot or only decorate it.
Key terms
- Finite verb
- A verb form marked for tense and matched to its subject, able to serve as a clause's main predicate.
- Verbal
- A verb form, such as a gerund, participle, or infinitive, used as a noun or modifier instead of as the main verb.
- Gerund
- An -ing verbal that functions as a noun, such as the subject or object of a clause.
- Participle
- An -ing or -ed verbal that functions as an adjective, modifying a noun.
- Infinitive
- The 'to plus verb' form, which never carries tense and cannot act as a clause's main verb.
Watch it explained
- How it worksHow does a finite verb carry tense and a subject while a verbal carries neither of them?
- How it worksHow do you test a word ending in -ing to see whether it is the predicate or merely decoration?
- Worked exampleWalk me through labelling every verb form in 'Wanting to finish, the runner sprinting past the marker collapsed'.
- Common mistakeWhy isn't every -ing word a verb, given that 'swimming' can serve as a subject?
Check yourself
End of topic.