I remember to mail the letter but forget to buy the stamp.

　　我记得要去寄信可忘了买邮票了。

　　I don't regret telling her what I thought.

　　我不为告诉她我的想法而后悔。

　　Since the front door won't open, why not try opening the back door?

　　前门打不开，为何不试一试后门呢？

　　I mean to change it for another one.

　　我想换成另外一个。

　　Missing the train means waiting for another hour.

　　误了这班火车就意味着再等一小时。

　　4

　　(安徽高考改编)I remembered to_lock (lock) the door before I left the office, but forgot to turn off the lights.

　　5．动词need, require, want表示"需要"时，其后跟动名词的主动式或不定式的被动式作宾语，意义没有区别。

　　The window needs/requires/wants cleaning.

　　＝The window needs/requires/wants to be cleaned.

　　这个窗户需要擦了。

　　5

　　(湖南高考改编)We've had a good start, but next, more work needs doing/to_be_done (do) to achieve the final success.

　　三、动词­ing形式的否定形式

　　动词­ing形式的否定形式通常是在其前加not，带有逻辑主语时not应放在动词­ing形式之前。

　　You have no excuse for not going.

　　你没有理由不去。

　　He was punished for not having done his homework.

　　他因未完成作业而受到惩罚。

　　I'm sorry for not having kept my promise.

　　对不起，我没有兑现我的承诺。

　　四、动词­ing形式的复合结构

　　动词­ing形式的复合结构的构成方式为：名词所有格/形容词性物主代词＋动词­ing形式。此结构多在句中作主语和宾语等，其中名词所有格/形容词性物主代词是动词­ing形式的逻辑主语。当该复合结构作宾语时，名词所有格可用普通格代替，形容词性物主代词可用代词宾格代替，但作主语时不可以。

　　Do you mind my/me coming late for the film?

　　我看电影迟到你介意吗？

　　Mary's being late for class made her teacher very angry.

　　玛丽上课迟到让她老师非常生气。

　　Her coming to help encouraged all of us.

她来帮忙鼓舞了我们。