6.1 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 busylook forward to(to为介词）
no good,　no use,　It’s worth…,　 as well as,
can’t help,　It’s 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 oncount on / upon
set about　 be successful in　 good attake up
give upburst outprevent … from…
3）作表语Her job is washing，cleaning and taking care of the children.
6.2 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 sb 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。