set out和set off都有出发的意思,区别: set off更含开始(旅行、赛跑等）的意思, 例：what time are you planning to set off tommorrow?你明天打算几点钟启程? they've set off on a journey round the world. 他们已经开始环游世界. set out意思是从某地出发上路 例：she set out at dawn.她天一亮就动身了. 另外,set out to do sth是开始／着手干某事 而, set sb off doing sth是使某人开始干某事
