Having been done 是現(xiàn)在分詞的完成時的被動語態(tài),用的時候常常會出現(xiàn)一個段時間狀語.如：
Having been built for two years,the building will be used as a hospital
,done是過去分詞,表示被動和完成,如
completed last month,the building will be used as a hospital
having done 是現(xiàn)在分詞的完成時的主動形式,用的時候常常會出現(xiàn)一個段時間狀語.如
Having worked for a long time ,the workers are all very tired.____many times,he still couldn't understand it.A、Having been told B、Told為什么答案是A，現(xiàn)在分詞完成時的被動，B也可以表示完成和被動啊。同樣，還有一道題：The building____last year is a restaurant.A、having been builtB、built這道題為什么選B呢？____many times,he still couldn't understand it.句中的many times 是一個段時間狀語，只能用Ahaving been told The building____last year is a restaurant句中l(wèi)ast year 不是一個段時間狀語，而是一個過去的時刻的狀語，只表是過去，所以用Bbuilt請再比較一下我前面給的例句，與你的上面兩個例句并不矛盾！