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Few structures in English do as much work with so little equipment as the gerund phrase. You take a verb, add -ing, and suddenly it stops acting like a verb and starts acting like a noun—sometimes a whole noun phrase. That single trick lets the same handful of words play subject, object, or the thing sitting after a preposition. Once you can spot a gerund phrase and tell it apart from a participial phrase, a huge chunk of English grammar becomes easier to steer.
Table of Contents
- Defining the Gerund
- Building a Gerund Phrase
- When the Gerund Phrase Is the Subject
- When It Works as a Direct Object
- Gerund Phrases Renaming the Subject
- After Prepositions
- Telling Gerunds Apart from Participles
- Picking Between a Gerund and an Infinitive
- Possessive Forms in Front of Gerunds
- Verbs That Demand a Gerund
- Try It Yourself
Defining the Gerund
A gerund is a verb's -ing form doing the job of a noun. It shares its spelling with the present participle, but that's where the resemblance ends. The participle either modifies something or helps build a continuous tense; the gerund names an activity the way any other noun would.
Gerund (noun): "Baking calms her down." (Subject of "calms.")
Present participle (adjective): "The baking tray is still hot." (Modifies "tray.")
Present participle (verb phrase): "He is baking bread for Sunday." (Part of the progressive.)
Building a Gerund Phrase
Stretch a gerund out with the words that depend on it—objects, modifiers, adverbs, prepositional phrases—and the whole bundle becomes a gerund phrase. Grammatically, it still behaves like a single noun.
"Jogging along the river at sunrise clears his head."
Gerund: "Jogging"
Prepositional phrase: "along the river"
Adverb phrase: "at sunrise"
All of it together sits as the subject of "clears."
When the Gerund Phrase Is the Subject
Because the phrase functions as a noun, it can happily sit in front of the main verb and run the sentence:
"Tutoring math on weekends pays her bills."
"Hiking the Appalachian Trail takes six months on average."
"Speaking honestly with your team builds real trust."
"Editing your own writing is harder than it sounds."
"Waking up before dawn is not for everyone."
When the whole phrase acts as the subject, the verb that follows is singular—the phrase names one activity, not several. So "Drinking enough water matters," not "matter," no matter how many nouns appear inside the phrase.
When It Works as a Direct Object
Plenty of verbs like to grab a gerund phrase as their object. Ask "what?" after the verb and the gerund phrase answers:
"The kids love building forts in the backyard." (Love what?)
"I keep forgetting his name."
"She avoids driving on the highway at night."
"We postponed redecorating the kitchen until spring."
"He denied leaking the memo."
Gerund Phrases Renaming the Subject
Put a linking verb (most often is, was, or seems) between a subject and a gerund phrase, and the phrase doubles back to redefine that subject:
"Her real talent is spotting patterns in messy data."
"The trickiest part was explaining the bug to non-engineers."
"My weekend plan is catching up on sleep."
"A quiet comfort is reading by the fireplace."
After Prepositions
Any time a verb follows a preposition, it has to wear its gerund form. This is one of the most reliable rules in English grammar, and violating it sounds instantly wrong:
"She's serious about finishing her novel this year."
"I'm sick of arguing over the thermostat."
"He got ahead by showing up early every morning."
"Thanks for covering my shift last week."
"They walked out without settling the bill."
Rule: Whatever the preposition—in, on, at, by, for, about, of, with, without, before, after—the verb that follows takes -ing. Never an infinitive. "Good at drawing," never "good at to draw."
Telling Gerunds Apart from Participles
Gerund phrases and present participial phrases are identical twins on paper—both start with an -ing word. The difference is what they're doing in the sentence:
| Feature | Gerund Phrase | Participial Phrase |
|---|---|---|
| Function | Noun | Adjective |
| Role | Subject, object, or complement | Modifies a noun or pronoun |
| Swap test | Replace with it or something | Replace with an adjective |
| Example | "Dancing barefoot feels great." (= It feels great.) | "Dancing barefoot, she twirled across the floor." (describes "she") |
The swap test settles most cases. If the -ing phrase can be replaced by a pronoun without breaking the sentence, you've got a gerund phrase. If it can be lifted out and the sentence still makes sense on its own, it's a participial phrase modifying something nearby.
Picking Between a Gerund and an Infinitive
Certain verbs want a gerund after them; others insist on an infinitive; a third group happily accepts either. Here's the short map:
Gerund-Only Verbs
enjoy, avoid, finish, mind, suggest, consider, keep, practice, deny, risk, miss, delay, imagine, appreciate, quit, resist, postpone, recall, tolerate
"They enjoy hiking." (Not "they enjoy to hike.")
"He quit smoking last year." (Not "quit to smoke.")
Infinitive-Only Verbs
want, need, hope, plan, decide, agree, promise, refuse, expect, learn, appear, seem, offer, pretend, manage, afford, fail, tend
"We hope to move by June." (Not "hope moving.")
"He refused to comment." (Not "refused commenting.")
Either Form, Same Meaning
begin, start, continue, love, like, hate, prefer
"The crowd began cheering." = "The crowd began to cheer."
Either Form, Different Meaning
"She stopped checking her email." (She no longer checks it.) vs. "She stopped to check her email." (She paused so she could.)
"He remembers locking the car." (He has a memory of doing it.) vs. "He remembers to lock the car." (He doesn't forget.)
"I tried switching browsers." (I gave a new approach a shot.) vs. "I tried to switch browsers." (I attempted, maybe unsuccessfully.)
Possessive Forms in Front of Gerunds
In careful writing, the person or thing performing the gerund should appear in the possessive, not the object form:
✓ Formal: "We appreciate your attending on short notice."
✗ Informal: "We appreciate you attending on short notice."
✓ Formal: "His showing up late cost us the contract."
✗ Informal: "Him showing up late cost us the contract."
In day-to-day speech the object form slips by without comment. The possessive is the safer pick whenever you're writing something that will be edited, marked, or published.
Verbs That Demand a Gerund
Keep this wider list handy as a reference. Any of these verbs taking a verb form after them will take a gerund:
| admit | avoid | consider | delay |
| deny | dislike | enjoy | escape |
| finish | forgive | imagine | involve |
| keep | mention | mind | miss |
| permit | postpone | practice | quit |
| recall | recommend | resist | risk |
| suggest | tolerate | understand | appreciate |
Try It Yourself
Find the gerund phrase in each sentence and say what it's doing:
- "Skateboarding through empty parking lots kept him sane in college."
- "My sister practices sketching portraits on the subway."
- "Her biggest hurdle was asking for a raise."
- "I rely on walking the dog to clear my head."
- "We can't stand sitting through another safety video."
Answers: 1. "Skateboarding through empty parking lots" — subject. 2. "sketching portraits on the subway" — direct object. 3. "asking for a raise" — subject complement. 4. "walking the dog" — object of the preposition "on." 5. "sitting through another safety video" — direct object.
Key Takeaway: A gerund phrase is an -ing verb form plus its hangers-on, working together as a noun. Wherever a noun can go, a gerund phrase can go with it. Use the pronoun swap test to separate it from a participial phrase, stick to gerunds after prepositions, and memorize which verbs demand which form.