等别人替你做决定是没有用的。

　　It is a waste of time persuading such a person to join us.

　　劝说这种人加入我们是浪费时间。

　　[即时演练2]　用所给词的适当形式填空

　　①It is a waste of time trying (try) to persuade him to give up playing computer games.

　　②It is worthwhile reading (read) such a wonderful novel.

　　③(上海高考改编)It's no use complaining (complain) without taking action.

　　3．当句型"There is no ..."表示"不允许、禁止某种行为的发生或存在"时，需用动词­ing形式作主语。

　　There is no denying that the environment is from bad to worse.

　　不能否认环境状况正在逐步恶化。

　　There is no joking about such matters.

　　这种事开不得玩笑。

　　[即时演练3]　翻译句子

　　①不能说出他要做什么。

　　There_is_no_telling_what_he_is_going_to_do.

　　②和他不能开玩笑。

　　There_is_no_joking_with_him.

　　二、动词­ing形式作宾语

　　1．作动词的宾语

　　常接动词­ing形式作宾语的动词可用下面的口诀帮助记忆：

　　避免错过少延期(avoid, miss, postpone)

　　建议完成多练习(advise/suggest, finish, practise)

　　喜欢想象禁不住(enjoy, imagine, can't help)

　　承认否定与嫉妒(admit, deny, envy)

　　逃避冒险莫原谅(escape, risk, excuse)

　　忍受保持不介意(stand, keep, mind)

　　Would you mind opening the window?

　　你介意打开窗子吗？

　　I don't like watching television but I enjoy listening to the radio.

　　我不喜欢看电视，但是喜欢听收音机。

　　He tried to avoid answering my questions.

　　他试图对我的问题避而不答。

　　2．作动词短语的宾语

常见的跟动词­ing形式作宾语的动词短语有：insist on, object to, be good at, be fond of,