1 动名词作主语、宾语和表语
　　1）作主语
　　Fighting broke out between the South and the North.
　　南方与北方开战了。
　　2）作宾语
　　a. 动词后加动名词doing作宾语 V+ doing sth
　　admit 承认　 appreciate 感激，赞赏　 avoid 避免
　　complete 完成　 consider 认为　 delay 耽误　 deny 否认　 detest 讨厌　 endure 忍受　  enjoy 喜欢　 escape 逃脱　 prevent阻止　 fancy 想象　 finish 完成　 imagine 想象　 mind 介意　 miss 想念　 postpone 推迟　 practise 训练　 recall 回忆　 resent 讨厌　 resist 抵抗　  resume 继续　 risk 冒险　 suggest 建议　 face 面对　　　　include 包括　 stand 忍受　  understand 理解　 forgive 宽恕　 keep 继续
　　举例：
　　（1）Would you mind turning down your radio a little，please？
　　（2）The squirrel was lucky that it just missed being caught.
　　b.词组后接doing
　　admit to　 prefer…to　　be used to
　　lead to　　　devote oneself to　 object to
　　stick to　　 busy　　　　look forward to（to为介词）
　　no good，　no use，　It is worth…，　 as well as，
　　can not help，　It is no use /good　 be tired of
　　be fond of　 be capable of　 be afraid of
　　be proud of　 think of / about　 hold off
　　put off　 keep on　 insist on　　count on / upon
　　set about　 be successful in　 good at　　take up
　　give up　　burst out　　prevent … from…
　　3）作表语
　　Her job is washing，cleaning and taking care of the children.
　　2 worth 的用法
　　worth，worthy，worth-while都为adj.意为"值得".
　　1. worth：be worth + n.当名词为金钱时，表示"…… 值得……"
　　be worth doing sth."……某事值得被做"
　　The question is not worth discussing again and again.
　　2. worthy：be worthy of +n.当名词为抽象名词时表示"……值得……"
　　be worthy to be done "某事值得被做"
　　The question is not worthy to be discussed againand again.
　　3. worth-while：be worth-while to do sth"值得做某事"
　　worth while：It is worth while doing sth
　　It is worth while ** to do sth.
　　典型例题
　　It is not ____ to discuss the question again and again.
　　A.worth　B.worthy　C.worth-while　D.worth while
　　答案C. 由worth的用法可知，此句只适合词组be worth-while to do sth.。因此选C