Appear Doing vs. Appear To Do
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.”
Use “appear to do” or “appear to be doing” for the seeming/appearance construction; do not substitute bare “appear doing” as a parallel complement. An -ing form after appear can belong to another structure or sense, so “appear doing” is not a free alternative to “appear to do.”
Key details
Further guidance
Boundary
An -ing form after appear can belong to another structure or sense, so “appear doing” is not a free alternative to “appear to do.”
Construction
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.”
Decision
Use “appear to do” or “appear to be doing” for the seeming/appearance construction; do not substitute bare “appear doing” as a parallel complement.
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.
- Appear — Cambridge Grammar (opens in a new tab)Cambridge Dictionary · Appear as linking verb and appear + to-infinitive
- 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