动词-ing形式作表语和宾补的三个要点
考点一：考查动词-ing形式作表语的用法
【考题实例】The wife said to his husband, “Buying such a white elephant is simply _______ (waste) money.”
【考点分析】答案为wasting。在通常情况下，如果主语动词的-ing形式，则其表语通常也用-ing形式。又如：
Doing that was playing with fire. 这样做是玩火。
Talking to you is talking to the wall. 和你谈是对牛弹琴。
Denying this will be shutting one’s eyes to facts. 否认这一点就是睁眼不看事实。
【知识拓展】动词-ing形式作表语有两个明显特点：一是表示等价内容，即表示表语与主语“等价”，用以具体说明主语的具体内容，此时的动词-ing形式就是传统语法中的动名词；二是表示主语的性质或特征等，此时的动词-ing形式就是传统语法中的现在分词，但这样的-ing形式通常已转化为形容词。如：
My job is looking after the children. 我的工作就是照看这些孩子。(动名词looking after…作表语，表示主语my job的具体内容)
The work is difficult, but it is interesting. 这件工作虽然很难，但很有趣。(现在分词转化来的形容词interesting作表语，表示主语the work的特征)
考点二：考查动词-ing形式作宾补的用法
【考题实例】He arrived home just in time to see his brother _______ (take) away by the police.
【考点分析】答案为being taken。根据句子前半部分的He arrived home just in time to see（他到家时正好看到）可知，空格处所填动词是指一个动词正在进行或发生的瞬间，故宜用动词的-ing形式，再根据句末的 by the police（被警察）以及his brother与take之间的关系，可知此处的动词-ing形式应用被动式，句意为：他到家时正好看到他的兄弟被警察带走。又如：
He often came to watch the boats being loaded and unloaded. 他常常到这里来看轮船装货卸货。
I woke up to hear the bedroom door being opened slowly. 我醒过来，听见卧室的门慢慢地被推开。
【知识拓展】与动词-ing形式作表语类似，动词-ing形式作宾补也有两个明显特点：一是表示等价内容，即表示宾补与宾语“等价”，用以具体说明宾语的具体内容，此时的动词-ing形式就是传统语法中的动名词；二是表示宾语的性质、特征、正在进行的动作等，此时的动词-ing形式就是传统语法中的现在分词，这样的-ing形式若表示宾语的性质特点，则通常可视为形容词来理解，若表示宾语进行的动作，则不能视为形容词。如：
I call this robbing Peter to pay Paul. 我管这叫做拆东墙补西墙。（宾补robbing Peter to pay Paul为传统语法中的动名词，用以说明 this 的具体内容）
No one thought the film interesting. 没人认为这部电影很有趣。（宾补interesting为传统语法中的现在分词，其实已转化为形容词，它在此用以说明 film 的性质或特点）
The police observed the man entering the bank. 警方监视着那男子进入银行的情况。（宾补entering the bank为传统语法中的现在分词，用以说明 them man 当时正在进行的动作）
考点三：考查动词-ing形式作表语时与-ed形式的区别
【考题实例】Please stop making that noise—it’s getting ________ (annoy).
【考点分析】答案为annoying，不能填annoyed。本考点主要涉及动词-ing形式与-ed形式的用法区别。又如：
It was half seven; her mother would be annoyed because he was so late. 7点半了，他到得这么晚，她母亲一定会生气的。
It’s really annoying when a train is late and there’s no explanation. 火车误点而又不作任何解释，这很令人恼火。
【知识拓展】有的同学认为：-ed形容词只用于修饰人，-ing形容词只用于修饰事物，其实不一定。正确的理解是：-ed形容词指人的感觉，表示人感到如何；而-ing形容词则指事物给人的感觉，表示令人感到如何。比较：
The man was very much frightened. 这个人非常害怕。
The man was very much frightening. 这个人非常可怕。
Her son was very disappointed. 她的儿子非常失望。
Her son was very disappointing. 她的儿子非常令人失望。
-ed形容词除用于说明人的感觉外，有也用于修饰voice, look, expression, appearance, manner, smile等，用以表示该名词逻辑主语的感觉。如：
He gave her an astonished look. 他惊异地望了她一眼。
Mr. Knight gave a satisfied smile. 奈特先生露出满意的微笑。
His face wore a puzzled expression. 他脸上有一种困惑的表情。
She had a worried look on her face. 她脸上有一种忧虑的表情。
【即学即练】用括号内所给词的适当形式填空，每空限填一词：
1. Can we call this _______ (serve) mankind?
2. The real problem is _______ (get) to know the needs of the customers.
3. Her suggestion was _______ (have) our conversation in French.
4. My teacher is both gentle and _______ (encourage) towards me.
5. I don’t like making speeches in public; it’s so _______ (embarrass).
6. You must find it _______ (excite) working here.
7. She smelt something _______ (burn) and saw smoke rising.
8. He often came to watch the boats _______ _______ (load) and unloaded.
9. I woke up to hear the bedroom door _______ _______ (open) slowly.
10. If she catches you _______ (read) her diary, she’ll be furious.
参考答案：1. serving 2. getting 3. having 4. encouraging 5. embarrassing 6. exciting 7. burning 8. being loaded 9. being opened 10. reading