They couldn't help jumping up at the news.

　　听到这个消息他们不禁跳了起来。

　　Sorry，I can't help (to) clean the room for you.I must go at once.

　　对不起，我不能帮你打扫房间了，我必须马上走。

　　I regret to tell you that all the tickets have been sold out.

　　我遗憾地告诉你，所有的票都卖光了。

　　Mary regretted telling lies to her mother.

　　玛丽后悔向母亲撒了谎。

　　[名师点津]　

　　有些含有"需要"意义的动词，如：want，need，require等，其后通常接动词­ing形式的主动形式表示被动含义或接不定式的被动形式。

　　This kind of plant needs watering/to be watered twice a week.

　　这种花一星期需要浇水两次。

　　Ⅰ.单句语法填空

　　1． (read)the chapter four times，I finally understood the author's theory.

　　2． (warn)of danger in the street at night，she had to go home，with a friend following her.

3．He had to admit (steal)the money.