if carried out regularly,can improve our health.
=it can improve our health,if it is carried out regularly,
主从句主语it所指相同,可省略.本句为被动句,故carry为过去式.
if carried out regularly,can improve our health.
=it can improve our health,if it is carried out regularly,
主从句主语it所指相同,可省略.本句为被动句,故carry为过去式.