同学你好，该知识点来自沪江网校《2020考研VIP协议班【政治+英语一】》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。

See a beautiful girl throw banana skin to the ground is a disabled boy who is pick it up and put it into the dustbin不对 see不能做主语
。2、
Standing in the dormitory was a student who was calling his mother to ask how to wash dirty socks。
3、Running on the track is a student who is facing the encouragement of his parents to rush for full marks in English but ignores the development psychology是对的

同学你好，该知识点来自沪江网校《2020考研VIP协议班【政治+英语一】》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。

第一个句子seeing