Can I omit "while" before -ing form? Are these two the same in terms of meaning?

  • I think while walking.
  • I think walking.

I can see a problem with different verbs:

  • I learn while walking.
  • I learn walking.
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    This question doesn't make sense. Are you asking whether you can say I think walking instead of I think while walking? If that's what you mean, (a) please edit your question to make that clear, and (b) the answer is only if the first verb can't take the second as an object. I can think walking is ambiguous since walking might be the object of think, whereas I can walk chewing gum is unambiguous. The grammar experts may be able to explain why in better terms than this :-) – Chappo Hasn't Forgotten Monica Feb 9 '19 at 0:45
  • 1
    @Chappo What immediately came to my mind when reading I can walk chewing gum was somebody dragging a piece of chewing gum behind them on a leash. – Jason Bassford Feb 9 '19 at 3:30
  • @JasonBassford that occurred to me too! I had thought of finding a better example, but ultimately I couldn't resist the ironic allusion to "walking and chewing gum at the same time". – Chappo Hasn't Forgotten Monica Feb 9 '19 at 3:37
  • @Chappo Thank you, you probably answered my question. I edited the question to clarify the meaning to what you suggested. – Oliver Tušla Feb 10 '19 at 12:10
  • So, summarising the comments, the answer is: yes, it is grammatical, but if there is a more likely interpretation, then it is not likely to be understood – Colin Fine Feb 10 '19 at 14:42

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