thanghnvn Wrote:my question is that what is the difference between the two patterns "... x while y..." and " main clause+with+noun+doing"
"With ____" is a modifier, so it has to make sense as a modifier (e.g., it must describe the previous part in some tangible way).
"[sentence] while [other sentence]" isn't a modifier construction, so it can contain two things that aren't directly related ("I learned Russian while I sat in traffic").