Answering to whether you should say walking "on foot" or "by foot", considering preposition use and English grammar.
Using the internet to help you learn English
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What is the difference between “by foot” and “on foot”? For
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Dr. Seuss Bright & Early Book Boxed Set Collection: The Foot Book; Marvin K. Mooney Will You Please Go Now!; Mr. Brown Can Moo! Can You?, The Shape of