定义（区分）：动名词在句中可以单独充当名词，也可以和其他单词搭配构成动名词短语，现在分词在句中充当形容词的作用,或用来构成现在时态
事物need+doing sth：the houses needs cleaning 这栋房子需要被打扫
形容词性物主代词+doing较为正式，宾语+doing比较口语
we are very excited about Jack's wining the first prize(正式) we are very excited about Jack wining the first prize(非正式)
what/how about doing sth :what about watching a movie
feel like doing sth :i feel like having a cup of tea ;我想喝一杯咖啡
no ...doing sth:ex.it's no good just having meetings
sit/stand/lie 连用：she sat on the grass readinga book
it作形式主语，no good/no use.ex.it is no use doing sth
