“have been doing” 才是現(xiàn)在完成進(jìn)行時(shí).如“She has been writing the letter since two hours ago.”兩個(gè)小時(shí)以來(lái),她一直都在寫(xiě)信.而“having been done”是現(xiàn)在分詞完成時(shí)的被動(dòng)式,表示該動(dòng)作發(fā)生在主句動(dòng)作之前已經(jīng)做完.這里考察非謂語(yǔ)動(dòng)詞的用法,“the words”是被藏的,用過(guò)去分詞的形式即可,相當(dāng)于一個(gè)被省略的定語(yǔ)從句,補(bǔ)全為“Tom looked at Jenny,tears filling his eyes,and shouted out the words（which were）hidden in his heart for years.”后置定語(yǔ)不可以用“having been done”的形式.謝謝.