【答好了加分】having done,did,doing,being done having done,having been done 在句首区别区别

题目

【答好了加分】having done,did,doing,being done having done,having been done 在句首区别区别

答案

having done（主语）已经做了某事之后,作状语
did 貌似不放在句首吧
doing 如果doing sth是做主语的话,就是做某事怎么怎么样,如果放在句首做状语就是（主语）一做完……,就……
being done放句首只能是做主语,不存在做状语这一情况
having been done （主语）已经被……之后,作状语