A gerund is an -ing verb form used as a noun. It names an activity: “Swimming is fun.” It looks exactly like a present participle; only the job is different.
| Job | Example |
|---|---|
| subject | Swimming is good exercise. |
| direct object | She loves baking bread. |
| object of a preposition | Leo is good at drawing cartoons. |
| predicate noun | My favorite hobby is knitting. |
Key idea
Same -ing form, three possible jobs: a gerund names an activity (noun); a participle describes a noun (adjective); after a helping verb, the word is part of the verb.
Why it works
Gerunds let you talk about actions as things: you can like, start, finish, avoid or be good at an activity. A gerund phrase can be long (“Reading before bed every night helps me sleep”), but the whole phrase still does one noun job.
Worked example: Three jobs for swimming
“Swimming keeps Grandpa strong.” “The swimming children splashed us.” “The children are swimming.”
- Swimming keeps …: it names the activity and is the subject: gerund.
- The swimming children: it tells which children: participle.
- are swimming: it follows a helping verb: part of the verb phrase.
Answer: gerund, participle, verb
Common mistake
Mixing up gerunds and participles. Ask: does the -ing word name an activity (could you put it or this activity in its place)? Then it is a gerund. Does it describe a noun? Then it is a participle.