Confident About vs. Confident Of keeps its distinction narrow and example-led, based on Cambridge’s documented complement patterns rather than a universal substitution rule.
ReviewedEvidence1 sourceSectionEnglish Usage
Quick answer
Both confident about and confident of are documented: about can introduce a topic or situation, while of commonly introduces what someone expects or believes will happen.
Key details
Confusion Familyusage-construction
Rule Familyconstruction choice
Termsconfident about, confident of
Further guidance
Core difference
Cambridge lists confident about a subject or future situation and confident of an outcome such as victory or getting the needed votes.
Style Boundary
The two constructions overlap in the broad idea of certainty, so choose according to the complement and idiom of the sentence rather than enforcing a rigid rule.
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.
Confident↗ (opens in a new tab)Cambridge University Press · Direct learner-dictionary evidence for confident about and confident of constructions.
Agree With vs. Agree On separates directly documented constructions and keeps the distinction narrow rather than turning a context-sensitive pattern into a universal preposition rule.
Angry With vs. Angry About separates directly documented constructions and keeps the distinction narrow rather than turning a context-sensitive pattern into a universal preposition rule.
Appropriate For vs. Appropriate To separates directly documented constructions and keeps the distinction narrow rather than turning a context-sensitive pattern into a universal preposition rule.
Available To vs. Available For separates directly documented constructions and keeps the distinction narrow rather than turning a context-sensitive pattern into a universal preposition rule.
Be Bound To Do vs. Bound For Somewhere separates two distinct Oxford-documented senses. Bound to do/be expresses certainty or likelihood, while bound for + destination describes travel toward a place. The guide keeps those senses separate from legal or duty-bound uses.
Be Elated To Do vs. Elated By Something compares two directly documented complement patterns for “elated.” Oxford evidence supports an infinitival use as well as elated at/by + noun phrase, so the guide explains the construction choice without generalizing from synonyms.
