分词有现在分词和过去分词两部分
现在分词表示主动意义和动作在进行,现在分词的一般式指分词的动作与谓语动词同时发生。现在分词的完成式表示分词的动
作发生在谓语动词之前。
过去分词表示被动意义和动作已完成(不及物动词的过去分词之表示动作已完成)。
肯定式:一般式: doing 完成式: having done
否定式:一般式: not doing 完成式:not having done
现在分词完成时的被动式:
having been done, not having been done
Being poor, he couldn’t go to school.
Having worked in the country for years, he know how to grow vegetable.
Heated, this kind of wood give off much smoke.