keep on + -ing — continue/repeat (GiU Unit 141, on/off 2)
The frame
Section titled “The frame”Kate’s not good at making decisions. She keeps on changing her mind. ✓
Words: keep + on + changing + her + mind. keep on + -ing = continue / do repeatedly — Kate flip-flops constantly.
keep on vs keep
Section titled “keep on vs keep”- keep on + -ing = continue/repeat (the phrasal verb; on intensifies): keeps on changing, kept on talking
- keep + -ing = same meaning without the particle: keeps changing her mind — also correct, but the exercise supplied on, so the answer includes it
- on placement: the on belongs to keep: ✗ “keeps changing her on mind”. Object her mind stays after changing.
keep-family
Section titled “keep-family”| keep + | meaning |
|---|---|
| keep on + -ing | continue, repeat |
| keep + -ing | continue doing |
| keep up (with) | maintain pace: keep up with the class |
| keep off | stay away from: keep off the grass |
| keep out | not enter: keep out! |
Source
Section titled “Source”Raymond Murphy, English Grammar in Use, Unit 141 — Phrasal verbs on/off 2. Ebot lesson 2026-09-05.