１、动名词定义；具有名词性质，可在句中担任主语、宾语表语、定语，且有所有格作修饰语。
２、 形式；以do为例
doing——being done
having done——having been done
３、用法；
（１主语；
Saying is easier than doing。
His coming here will be a great help。
It is no use waiting here， he has left。
It is no good smoking。
There is no getting along with him（简直无法和他相处）。
（２表语；
His job is keeping the hall clean as possible。
Seeing is believing。
（３宾语；
A动词宾语；He admitted taking the book。
I do mind your smoking here。
要点重点 要牢牢记住，下面动词须跟动名词作宾语；
admit，appreciate，avoid，complete，delay，deny，enjoy，fancy，finish，mind，practice，resent，risk，suggest，allow，permit…
特注；以allow为例；allow+doing sth（动名词作宾语）但可以；allow sb to do sth（不定式作宾补）。
这类动词常见如advise，allow，permit，recommend，etc。
B、作介词宾语；
He left without saying goodbye to us。
I`m looking forward to meeting you。（to在这里是介词）
（４）定语；