Oxford documents “start” with both -ing and to-infinitive complements. The forms are generally alternatives for beginning an action, not a dependable pair with separate meanings.
ReviewedEvidence1 sourceSectionEnglish Usage
Quick answer
Both “start doing” and “start to do” are standard. They usually express the same basic idea of beginning an activity.
Key details
Confusion Familygrammar-and-usage distinction
Rule Familyverb complement pattern
TermsStart Doing, Start To Do
Further guidance
Lexical Boundary
The complement choice is separate from other senses of start, such as starting a machine or starting a business.
Meaning Boundary
Avoid claiming a universal aspect or timing difference between the two forms; context can affect emphasis without creating a fixed rule.
Shared Pattern
Use start + -ing or start + to-infinitive for the beginning of an activity when either fits naturally.
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.
Cambridge documents both admit + -ing and admit to + -ing for acknowledging something. Other passive patterns such as “be admitted to be” are separate constructions.
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.
