afraid to do vs afraid of doing — hesitation vs dread (GiU Unit 66)
The pair
Section titled “The pair”If there’s anything you want to know, you can ask me. Don’t be afraid to ask. ✓
| afraid + to | afraid + of + -ing | |
|---|---|---|
| Meaning | too hesitant/reluctant to perform the act | fear of the activity itself or its consequences |
| Test | “don’t hesitate to” fits | “dread the experience of” fits |
| Example | Don’t be afraid to ask (go ahead!) | afraid of flying, afraid of making mistakes |
Frame = invitation/permission → removing hesitation → to ask. If the fear were of a bad outcome (looking foolish), afraid of asking would apply.
The wider pattern (Unit 66)
Section titled “The wider pattern (Unit 66)”Any adjective of emotion splits the same way:
- sorry to tell you (about to act) vs sorry for telling you (after the fact)
- glad to help (willing) vs (no of-form)
- interested to hear (curious to learn) vs interested in hearing (open to it)
to = forward, of + -ing = the thing itself
Section titled “to = forward, of + -ing = the thing itself”to-form points at the decision to act; of + -ing points at the activity/consequence. Ask which the fear attaches to.
Source
Section titled “Source”Raymond Murphy, English Grammar in Use, Unit 66 — to… (afraid to do) and preposition + -ing (afraid of doing). Ebot lesson 2026-09-05.