Cambridge documents both admit + -ing and admit to + -ing for acknowledging something. Other passive patterns such as “be admitted to be” are separate constructions.
ReviewedEvidence2 sourcesSectionEnglish Usage
Quick answer
Use “admit doing” or “admit to doing” when acknowledging an action. In “admit to doing,” **to** is a preposition and therefore takes an -ing form; ordinary “admit to do” is not the equivalent pattern.
Key details
Confusion Familygrammar-and-usage distinction
Rule Familyverb complement pattern
TermsAdmit Doing, Admit To Do
Further guidance
Boundary
Do not infer from “admit to …” that a bare verb should follow. “Admit to doing” and passive/raising patterns such as “be admitted to be” need separate analysis.
Construction
Cambridge gives “admit doing” and “admit to doing”; the to in the second pattern is prepositional, not an infinitive marker.
Decision
Use “admit doing” or “admit to doing” for acknowledgement of an action.
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.
Both patterns are standard. “Advise waiting” recommends an action generally or in context, while “advise him to wait” names the person who is advised to perform it. A that-clause is another standard option.
When “afford” is followed directly by another verb, standard learner references use a to-infinitive: “afford to do.” An -ing form can appear elsewhere in a sentence, but it is not a like-for-like direct complement after “afford.”
“Agree to do” expresses consent to take an action. An -ing form normally follows a preposition in patterns such as “agree with doing,” which expresses approval rather than the direct promise-to-act construction.
Cambridge documents aim + to-infinitive for intention and aim at for directing effort toward an objective. Do not omit the preposition and present bare “aim doing” as equivalent to “aim to do.”
“Allow” can take an activity as its object, as in “allow smoking,” or a person/thing followed by a to-infinitive, as in “allow visitors to enter.” The patterns answer different structural questions: what is allowed versus who is allowed to do what.
Cambridge describes appear as a linking verb and with a to-infinitive; a progressive action can sit inside that infinitive, as in “appears to be working.” An -ing form after appear can belong to another structure or sense, so “appear doing” is not a free alternative to “appear to do.”
