请高手回答 ing+过去分词放句首的用法刚刚看玩了,分词放句首做状语的用法.但是有时遇到,Having +过去分词,+句子.或则Having been +过去分词 这是什么用法,或则什么语法 麻烦高手详解有例子说实话1楼的虽然只是句子还好理解，2楼的什么完成被完成的，没句子很抽象

抱歉，语法一窍不通，只能给例句
Having all the features , it is definitely an outstanding works.
它具备了所有的特征，毫无疑问是一件杰作。
Having been together for more than60 years, Eric and Betty were regarded as the Darby and Joan of he village.
埃里克和贝蒂生活在一起60多年了,他们被认为是村里一对幸福的老夫妇。

Having +过去分词+句子
have done 是表示完成某事，主动语态
Having been +过去分词
have been done 是 表示某事被完成，被动语态
你要问的是这个吗？
having done就是现在完成时的进行时态

分词位于句首作状语时,其逻辑主语都是这个句子的主语.
例：Finishing his homework,he went out for a walk.
完成作业后,他出去散步了.
至于“Having +过去分词+句子,Having been +过去分词” 的句子,其用法都是相同的,只是强调的角度不同而已.单独用分词时,只强调动作的完成,不涉及对“现在”的影响,而用“Having +过去分词+句子,Having been +过去分词”时,就必须涉及到“现在”,也就是现在完成时的基本用法.
例：Having seen the film,he felt very excited.
Having been living in this city for a month,he visited many places of interest.
当然,如果是过去分词（短语）作状语,则含有被动意义.
例：Hit by a car yesterday,he he had to be in hospital.
Watered by my grandmother,the flowers in the garden look more beautiful.