set out,set off,set about 可以互用吗

set out,set off,set about 可以互用吗
set out,set off,set about 可以互用吗

set out,set off,set about 可以互用吗
他们都有“开始做某事”的意思,但是
set off,set out跟to do sth.
而set about里的about是介词,所以要跟ing形式：
set about doing sth.