doing , done , to do , doing 锟斤拷锟斤拷然锟斤拷锟斤拷锟叫革拷锟皆诧拷同锟侥变化锟斤拷式锟斤拷锟界:
锟斤拷锟节分达拷 doing : 锟斤拷being done锟斤拷锟斤拷锟斤拷式锟斤拷 ; having done 锟斤拷锟斤拷锟绞斤拷锟; having been do
ne 锟斤拷锟斤拷杀锟斤拷锟绞斤拷锟