同学你好，该知识点来自沪江网校《大学英语四六级【连读班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学，你好！

你学习很认真仔细，你的总结是对的，但是这个说法不全面。有一些现在分词的句子里是可以按照同学的总结，但并不是所以的都是哦。
课件第9页  19:00 处例句1. The man holding a gun shouted at us to lie down.
可以变为The man who was holding a gum shouted at us to lie down.
把holding 所在短语变为从句是who was holding，省略了 who 和 was。
以上例子是同学所提到的从句的省略。

课件第6页例句When leaving the airport,they waved again and again to us.
原句是When they were leaving the airport,they waved again and again to us.
这句话省略了they were，连接词when不能省略哦。

课件第5页 5:00处 例句2.His parents died,making/leaving him an orphan.
如果要把这句话变成从句，应该是His parents died, which made/left him an orphan.
那么这句话是把which made/left 变成making/leaving，从句的主语是which指代的前面的整个句子，变化跟同学的总结有点不一样哦。

同学就按照课件归纳现在分词的用法学习就好啦，这样比较简单。

希望真正的解答可以帮助到同学，祝同学学习进步哦~~