Be Careful To Do vs. Careful About Something
Oxford directly records careful + to-infinitive and careful about + noun/gerund, supporting this complement comparison.
Use “careful to do something” when describing deliberate care in performing an action. Use “careful about something/doing something” when naming the matter or activity toward which caution is directed.
Key details
Choose the right form
| Meaning / situation | Construction | Decision |
|---|---|---|
| deliberate care in performing an action | careful to + verb | focus on taking care to perform the action |
| caution about a matter/activity | careful about + noun/-ing | focus on the matter requiring caution |
Quick tests
Action-or-matter test
Are you emphasizing deliberate care in doing an action, or caution about a topic/activity?
If yes: Use “careful to + verb” for the deliberate action.
If no: Use “careful about + noun/-ing” for the matter toward which caution is directed.
Caveat: Both are documented complements; context determines which relation you mean.
Examples
Be careful to save a copy before closing.
The infinitive names the action to perform deliberately.
Be careful about sharing private information.
The -ing phrase names the activity requiring caution.
She is careful about the wording she uses.
“About” introduces the matter receiving caution.
Further guidance
Core difference
Oxford documents careful + to-infinitive and careful about + noun/gerund as standard patterns.
Style Boundary
The patterns overlap semantically but are not mechanically interchangeable; preserve about when the complement is the object/activity of caution.
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.
- Careful (opens in a new tab)Oxford University Press · Direct learner-dictionary evidence for careful about + noun/gerund and careful + to-infinitive.