Hear Someone Do vs. Hear Someone Doing
After hear + object, both the bare infinitive and the -ing form are standard. The bare infinitive usually presents the perceived event as a whole or completed, while -ing usually presents it as in progress, incomplete, or repeated.
Both “hear someone do” and “hear someone doing” are standard; use the bare infinitive for the event viewed as a whole and -ing for an action viewed in progress or repeated.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| perceive the event as a whole or bounded occurrence | hear + person + bare infinitive | Use the bare infinitive when the event is viewed as a whole. |
| perceive an action in progress or as ongoing/repeated | hear + person + -ing | Use the -ing form for the unfolding or repeated activity. |
Quick tests
Meaning / construction test
Are you presenting the heard event as a whole rather than focusing on it in progress?
If yes: Use “hear someone do.”
If no: Use “hear someone doing” when the action is presented as ongoing, incomplete, or repeated.
Caveat: The contrast is primarily viewpoint/aspect, not a simple correct-versus-incorrect rule; real contexts can make either framing possible.
Examples
I heard the door slam.
The bare infinitive presents the sound event as a whole.
I heard them arguing in the hallway.
The -ing form presents an action in progress.
We heard the bell ring twice.
The bare infinitive presents the perceived event as a bounded occurrence.
Further guidance
Boundary
In the active perception pattern, do not insert “to” before the infinitive. Modal combinations such as can/could hear or see have additional usage constraints, so context matters.
Construction
Cambridge includes hear among perception verbs that can take object + bare infinitive or object + -ing.
Decision
Use the bare infinitive when the whole event is salient; use -ing when you are foregrounding the activity as it unfolds or repeats.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Verb patterns: verb + infinitive or verb + -ing? (opens in a new tab)Cambridge Dictionary · Verb-complement patterns, including verbs taking -ing, to-infinitive, or both with meaning differences