“自行其是”常见的英文表达有 “act on one's own” 、“do things in one's own way” 或 “go one's own way” 。
“act on one's own”：侧重于强调个人自主行动，不依赖他人或外部指示。例如：He always acts on his own and never consults with others.（他总是自行其是，从不和他人商量。 ）
“do things in one's own way”：更直白地表达按照自己的方式做事，突出做事的方式具有个人独特性。例如：She insists on doing things in her own way, regardless of what others think.（她坚持自行其是，不管别人怎么想。 ）
“go one's own way”：有坚持自己道路、不随大流，自行其是的意味。例如：He decided to go his own way and start his own business.（他决定自行其是，开始自己的创业之路。 ）