动名词
	    重要句型:
	    It’s/There’s no use/no good doing …
	    It is worthwhile doing …
	    There is no point in doing …做 …… 是没有意义的。
	    接动名词作宾语的动词
	    admit, avoid, delay, deny, enjoy, escape, finish, appreciate, consider, mind, risk, practise, dislike, resent(怨恨), advise, pardon, require, quit (戒除), suggest
	    有些动词后既可以跟动名词,也可以跟不定式
	    like, love, start, continue, attempt, propose, forget, recall, endure, permit, deserve, regret, omit (疏忽,省略)etc.
	    to作为介词的短语
	    be used to,
	    be accustomed to,
	    be opposed to 反对,
	    be addicted to沉溺于,
	    be devoted to专心于,
	    look forward to
	    object to
	    see to 负责,留意
	    动词need, require, want, deserve后面跟动名词的主动形式表示被动意义。
	    All the cars in the yard need repairing.
	    I think that a man like him deserves looking up to.
	    动名词作宾语与不定式作宾语的区别
	    1) plan, like, love, hate后
	    动名词表示抽象行为和一般动作,不定式表示具体的、特定的动作。
	    He likes dancing but he doesn’t like to dance with strangers.
	    2) 意义差别大的动词:
	    rememberdoing
	    to do记得做过某事
	    记得要做某事
	    forgetdoing
	    to do做过某事但忘记了
	    忘记去做某事
	    regretdoing
	    to do对做过的事遗憾
	    对将要做的事遗憾
	    meandoing
	    to do意味着,意思是
	    想要
	    trydoing
	    to do试着做
	    努力做
	    go ondoing
	    to do继续做原来没做完的事
	    继而做另一件事
	    动名词的逻辑主语
	    动名词的逻辑主语可以是形容词性物主代词或宾格,在句中两者均可使用,在句首要用形容词性物主代词。
	    Their/Mary’s coming to help was a great encouragement to us.
	    His parents was unhappy about his/him marrying that girl.