What is a Gerund?
Gerund Definition, Gerund Phrases, Participle Comparisons & Examples
A gerund is a verb form ending in -ing that functions syntactically as a noun, allowing an action or state to serve as a sentence subject, direct object, subject complement, or object of a preposition (e.g., reading, running, swimming, baking).
Because gerunds share the exact -ing spelling of present participles, identifying one comes down to testing its job in the clause rather than checking its ending. Below, we cover the pronoun replacement test for spotting gerunds, how gerund phrases keep their internal objects and adverbs, when to use possessive determiners before a gerund, and an interactive gerund list you can filter by letter or length.
• Table of Contents
• Understanding Gerunds & the Pronoun Test
The fastest way to verify whether an -ing word is a gerund is the Pronoun Replacement Test: swap the -ing word (or the entire phrase built around it) with the singular pronoun it. In "Swimming builds endurance," replacing swimming produces "It builds endurance," which remains grammatically intact because the word occupies a noun slot. In "The swimming otter dove under the log," swapping in it produces "The it otter," proving that swimming is a present participle modifying a noun rather than a gerund.
Unlike pure nouns, gerunds keep part of their verbal DNA inside their own phrase while acting as a singular noun to the rest of the sentence:
Nominal Slot Outside
To the surrounding clause, a gerund behaves like a singular uncountable noun and always triggers singular verb agreement when it serves as the subject.
Verbal Mechanics Inside
Inside its own phrase, a gerund still takes direct objects and adverbial modifiers just like a finite verb, rather than requiring prepositions.
Complete Gerund Phrases
The head gerund plus its objects, complements, and modifiers fuse into a single gerund phrase that can be replaced by the word it.
• See it in Context
Placing a gerund after a preposition turns an ongoing activity into a compact noun object without needing a full subordinate clause. Swap the gerunds below to see how each action noun changes the meaning of the prepositional phrase.
• Gerund Rules & Gerund Phrases
Every gerund ends in -ing, but how it connects to surrounding determiners, negations, and objects follows strict syntactic rules. Apply these four diagnostic checks when editing gerunds and gerund phrases.
The "It" Pronoun Replacement Test
Every gerund or gerund phrase can be replaced with the singular pronoun "it" without breaking the grammar of the surrounding sentence.
- I enjoy reading biographies -> I enjoy it.
- Running on sand builds strength -> It builds strength.
Gerund Phrases Keep Verbal Complements
Although a gerund acts as a noun to the outside clause, it still takes direct objects and adverbs inside its own phrase.
- Restoring vintage motorcycles requires patience (singular verb).
- He avoided answering the reporter directly .
Possessive Determiners Before Gerunds
Formal prose places a possessive pronoun (my, your, his, her, our, their) or possessive noun before a gerund.
- The board approved her leading the audit.
- Do you mind my opening the window?
Negating Gerunds & Preposition "To"
Negate a gerund by placing "not" directly in front of it, and use a gerund whenever "to" is a preposition rather than an infinitive marker.
- Not backing up the server caused the data loss.
- We look forward to hosting the conference in May.
• Four Grammatical Roles of a Gerund
Because a gerund functions as a noun, it can fill the four primary argument and complement positions in an English clause. Notice how the word painting shifts its grammatical role below depending on its position relative to the main verb or preposition.
Subject of the Clause
Occupies the opening subject slot before the main finite verb and always takes third-person singular agreement.
Direct Object
Follows a transitive verb (such as enjoy, finish, avoid, or recommend) to name the activity receiving the action.
Object of a Preposition
Sits immediately after a preposition (in, on, at, without, before, after, by) where an infinitive cannot be used.
Subject Complement (Predicate Nominative)
Follows a linking verb (such as is, was, or became) to rename or define the subject of the sentence.
• Gerunds vs. Participles & Infinitives
Writers frequently confuse gerunds with present participles (which share the exact same -ing suffix) and infinitives (which also function as nominal verbals). Checking whether the word modifies a noun, follows a specific matrix verb, or takes a possessive pronoun resolves the ambiguity immediately.
Gerund vs. Present Participle
A gerund fills a noun slot ("The barking kept me awake"), whereas a present participle modifies a noun ("the barking dog") or follows "be" in progressive tenses.
Gerund vs. Infinitive Meaning Shifts
After verbs like stop, remember, and forget, a gerund refers to an existing or prior action ("stopped smoking" quits the habit), while an infinitive states a new purpose.
Possessive vs. Objective Case
When the -ing word is a gerund acting as an object, precede it with a possessive determiner ("my asking") rather than an object pronoun ("me asking").
• Gerund Examples: Top 50 Common Gerunds
While almost any action verb can form a gerund by adding -ing, these 50 gerunds appear most frequently as subjects and objects in everyday English. Click any word below to inspect its dictionary definition and usage examples.
• Browse Gerunds by Letter (A to Z)
• Gerund Finder & Search Tool
Use the filter tool below to search English gerunds by starting letter, ending pattern, contained letters, or exact word length.
• Test Yourself: Find the Gerunds
Apply the pronoun replacement test to separate nominal -ing words from adjectival participles. Click the gerund in each sentence below.