Re: Go by foot.
NOT A TEACHER
I will only add that saying "
go by foot" is a common mistake among learners of English. The reason is that the learners think that if you, for example, can say "go somewhere by car/plane/taxi etc." it means that you always state the means of transportation after "by" and thus " go by foot" is possible. Sadly for us learners, while that works with machinery, it does not work with feet. Btw. a useful alternative to "go somewhere by foot" is simply saying "walk somewhere".
I'm not a teacher, or a native English speaker. Feel free to edit my posts if you encounter any mistakes in them (be it grammatical or vocabular). It'll help me to improve my command of English.