英语ing的用法
1.–ing分词的构成主动形式 被动形式 doing being done 一般式 完成式 having done having been done 否定式:not+--ing/not having(been) done 不是 having not (been) done
2.一般式和完成式的用法--ing分词的一般式表示和谓语动词所表示的动作同时进行的一个动作;完成式表示先于谓语动词动作之前的一个动作。如: Walking along the street, he caught sight of an old friend of his. Not having studied his lessons very hard, he failed the examinations.
3.---ing分词的被动式当-ing分词与它的逻辑主语构成被动关系时,需要用被动形式。根据-ing 分词动作发生的时间,-ing分词的被动式分为一般被动式(being done)和完成被动式(having been done),如The question being discussed is very important. Having been praised by the teacher, he works even harder