【答好了加分】having done,did,doing,being done having done,having been done 在句首区别区别
人气:373 ℃ 时间:2019-10-18 08:07:24
解答
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