Verb Finiteness: Gerunds, Participles and Infinitives

American Diploma › Digital SAT Reading and Writing — Complete Course

A sentence can be long, full of facts and still be broken, because it has no real main verb. Finiteness questions test exactly this. The four choices are forms of one verb — *attracts, attracting, to attract, having attracted* — and you must decide whether the blank needs a finite verb (one that can be the main verb of a clause) or a non-finite form (an -ing word, a to-verb or a participle that only describes or adds information). Once you know the test, these questions become some of the fastest on the module.

What this question type tests

These questions belong to Standard English Conventions, which is about 26% of the scored Reading and Writing questions (about 11–15 questions across the two modules). Inside that domain, the official skill group Form, Structure, and Sense covers verb finiteness — the official list names gerunds, participles and infinitives versus finite verbs — together with tense, agreement and the other verb skills. Convention questions usually come in the later part of each module, after Information and Ideas.

The stem is: "Which choice completes the text so that it conforms to the conventions of Standard English?" You know it is a finiteness question when the choices mix finite and non-finite forms of the same verb:

• give / giving / to give / having given
• was moved / moving / to be moved / having moved
• it sent / sent / sending / sends

Finite and non-finite: the difference

A finite verb shows tense (and agrees with a subject). It can be the main verb of a clause on its own: *walks, walked, is walking, has walked, will walk, can walk, was built*. A non-finite form has no tense of its own and cannot be the main verb alone:

Remember: a helping verb turns a non-finite form into part of a finite verb. *Testing* alone is non-finite; *were testing* is finite. *Built* alone is non-finite; *was built* and *has built* are finite.

The finiteness test: subject → verb

1. Find the subject of the clause that contains the blank.
2. Look for its finite verb. Strip away everything between commas, *of*-phrases, and *who/which/that* clauses — their verbs belong to those small clauses, not to the main subject.
3. No finite verb yet? The blank must supply one: choose the finite choice (then check tense and agreement).
4. Finite verb already there? The blank must be non-finite (an -ing phrase, a to-verb, a participle) or a choice with a joining word. A second subject + verb after a comma, with no joining word, is a comma splice.

The long-subject trap

The SAT often builds a very long subject full of participles and extra information, so that you forget the main verb is still missing. Strip the sentence down:

• "The Great Library of Alexandria, founded in the third century BCE and supported by the Ptolemaic kings, ______ scholars from across the Mediterranean."
• Cross out the extra information between the commas: "The Great Library ______ scholars."
• The subject *Library* has no verb yet → the blank needs a finite verb: attracted. *Founded* and *supported* are participles inside the modifier, not main verbs.

The same trap works with relative clauses. In "The volunteers who cleaned the beaches ______ two tonnes of plastic", *cleaned* is the verb of the small clause *who cleaned the beaches*. The subject *volunteers* still needs its own verb: collected.

Every clause needs its own finite verb

A clause that starts with a subordinating word — *because, although, when, while, if, since, after, before, that* — must have its own subject and finite verb, and the sentence still needs a main clause.

• ✗ Although the tortoise moving slowly, it covers long distances. → ✓ Although the tortoise moves slowly, …
• ✗ Because the locust changing its color in crowds, scientists were confused. → ✓ Because the locust changes its color …
• ✗ When the rains arriving in summer. (no main clause either) → ✓ When the rains arrive in summer, the river rises.
• Verbs joined by and must be parallel: ✓ "Mangroves filter salt and release it" · ✗ "filter salt and releasing it".

When a non-finite form IS correct

Non-finite forms are not mistakes — they are the right choice whenever the clause already has its main verb and the blank only adds information.

-ing or -ed participle? An *-ing* participle is active (the noun does the action): "the volunteers hoping to help". A past participle is passive (the noun receives the action): "the papyri found in the cave" — the papyri did not find anything, they were found.

The method for test day

1. Read the choices. Finite forms mixed with -ing / to / having / being? It is a finiteness question.
2. Strip the sentence: cross out comma extras, of-phrases and who/which/that clauses. Find the main subject.
3. Ask: does this subject (or this although/because clause) already have a finite verb?
4. No → choose the finite verb, then check tense and agreement. Yes → choose the non-finite form; reject any choice that adds a new subject + verb after a comma.
5. Read the whole sentence once: one complete sentence — no fragment, no comma splice, parallel verbs after *and*.

Worked examples

Worked example 1: a long subject still needs its verb

Passage: "The Great Library of Alexandria, founded in the third century BCE and supported by the Ptolemaic kings, ______ scholars from across the Mediterranean who came to study its enormous collection of scrolls."

Question: Which choice completes the text so that it conforms to the conventions of Standard English?

• A) attracting
• B) to attract
• C) attracted
• D) having attracted

Answer: C) attracted. Cross out the modifier between the commas: "The Great Library ______ scholars." The subject has no main verb yet, so the blank must be finite. Only "attracted" is finite, and the past tense fits the historical context.

• A) attracting — An -ing form cannot be the main verb alone; the sentence becomes a fragment.
• B) to attract — An infinitive cannot be the main verb; still a fragment.
• D) having attracted — "Having attracted" is a perfect participle; there is still no main verb.

Worked example 2: the main verb is already there

Passage: "Last spring, volunteers planted thousands of mangrove seedlings along the Red Sea coast near Hurghada, ______ to protect the shoreline from erosion and to give young fish a safe place to grow."

Question: Which choice completes the text so that it conforms to the conventions of Standard English?

• A) they hoped
• B) hoping
• C) hopes
• D) and hoping

Answer: B) hoping. The sentence already has its subject and finite verb: "volunteers planted". After the comma we need a phrase that describes the volunteers, not a second main verb. The participle "hoping" does this.

• A) they hoped — "They hoped" is a complete clause after a comma with no joining word: a comma splice.
• C) hopes — "Hopes" is finite but has no subject of its own; it is also singular and present.
• D) and hoping — "And hoping" is not parallel: "planted … and hoping" joins a finite verb with an -ing form.

Worked example 3: when the participle is correct

Passage: "The clay tablets ______ at Amarna in 1887 are letters written in cuneiform script. Many of them were sent to the pharaoh by rulers of kingdoms in Western Asia."

Question: Which choice completes the text so that it conforms to the conventions of Standard English?

• A) were discovered
• B) discovered
• C) they discovered
• D) discover

Answer: B) discovered. The main subject and verb are already there: "The clay tablets … are letters." The blank only describes the tablets, so a non-finite participle is needed: "the tablets discovered at Amarna" (= that were discovered). The past participle is passive, which fits, because the tablets were found by someone.

• A) were discovered — "Were discovered" is finite; it creates two main verbs ("were discovered … are") with no joining word.
• C) they discovered — "They discovered" adds a new subject and verb; the sentence would have two clauses and no connection.
• D) discover — "Discover" is a finite present verb with no proper subject; it breaks the sentence and the time (1887).

Worked example 4: a relative clause is not the main verb

Passage: "The engineers who designed the new solar plant near Aswan ______ panels that turn slowly during the day to follow the sun across the sky, which increases the amount of electricity they produce."

Question: Which choice completes the text so that it conforms to the conventions of Standard English?

• A) choosing
• B) chose
• C) having chosen
• D) to choose

Answer: B) chose. Strip the relative clause "who designed the new solar plant near Aswan": "The engineers ______ panels." "Designed" belongs to the small clause, so the main subject "engineers" still needs a finite verb: "chose".

• A) choosing — "Choosing" is non-finite: "The engineers … choosing panels" is a fragment.
• C) having chosen — "Having chosen" is a participle; still no main verb.
• D) to choose — "To choose" is an infinitive; the sentence would still have no main verb.

Practice

Ten original questions in Digital SAT format. Strip each sentence, find the main subject, and decide whether its finite verb is already there.

All pages in this course

Start here

• The Digital SAT: Complete Overview
• Time Strategy and How to Attack Every Question

Craft and Structure

• Words in Context
• High-Value Vocabulary for SAT Reading and Writing
• Text Structure and Purpose
• Cross-Text Connections

Information and Ideas

• Central Ideas and Details
• Command of Evidence: Textual
• Command of Evidence: Quantitative
• Inferences

Standard English Conventions

• Sentence Boundaries
• Extra Information: Commas, Dashes and Brackets in Pairs
• Commas: Introductions, Lists, Adjectives — and When NOT to Use One
• Semicolons: Joining Two Complete Sentences
• Colons: After a Complete Sentence
• Dashes — and Choosing Between , ; : —
• Subject–Verb Agreement
• Pronoun–Antecedent Agreement, Clarity and Consistency
• Pronoun Case and Sound-Alike Pronouns
• Verb Tense and Aspect
• Verb Finiteness: Gerunds, Participles and Infinitives
• Dangling and Misplaced Modifiers
• Parallel Structure
• Faulty and Logical Comparisons
• Plurals and Possessives

Expression of Ideas

• Transitions
• Rhetorical Synthesis (Student Notes)

Full practice tests

• Digital SAT Reading and Writing — Practice Test 1
• Digital SAT Reading and Writing — Practice Test 2
• Digital SAT Reading and Writing — Practice Test 3