动词-ing形式做句子的各种成份
一、动词-ing 形式做主语
1、现在分词做主语表示事物化、抽象化的概念。强调：现在分词做主语时谓语一律用单数。
Eg:
Talking is an art.
Eg:
Tearning English well is not easy.
2、it 做形式主语的情况
It ' s no good/use doisth.做 ... '是没有用的
It ' s useful/useless do做g .... 是有/没有用的
There is no '''''''''doing sth.
Eg:
It is no use crying after knowing the result.
Eg:
It is no good playing games.
二、动词-ing 形式做表语
动词-ing形式做表语，一般表示比较抽象的习惯性动作。
1、句子主语常是表示无生命的事物的名词/抽象的习惯性动作。表语的主语和
位置可以互换）
Eg:
My hobby is playing games. ------- Playing games is my hobby.
Eg:
One of his bad habits is speaking loudly. ---------- Speaking loudly is one of hisbad habits.
Eg:
Your task is studying hard. ------------ S tudying hard is your task.
与现在进行时的区别：
He is flying?现在进行时，就不能转换成-------- Flying is he）
2、表示主语的某种性质或状态，描述主语的特征，相当于形容词，故不能与
主语互换。
系动词：
Eg:
This film is interesting.
Eg:
Today ' s weather is nice.
Eg:
The song sounds good.
（主语一般为物：
moving\ surprising\promising 有希望的）
三、动词-ing 形式做宾语
1、作动词的宾语
某些动词后只能用动词-ing 形式作宾语，不能用不定式。
allow \ cannot help' consider\ risk' suggest' forbid' protect'、'(from) 阻止\
admit\advise\ allow' avoid' delay 推迟\ enjoy' escape 逃脱\ finish\ give up\ imagine' mind'practise'
Eg:
I tried to avoid making mistakes.
Eg:
I suggest having a rest.
2、作介词的宾语
是一些固定的短语搭配：
Eg:
The book is worth reading.
Eg:
I am used to getting up early.
四、作宾语补足语
1、动词-ing形式可以在感官和心理状态的动词后面作宾语补足语，和宾语一起构成复合宾语。(表示动作的正在进行，状态正在持续)
Eg:
I watched a student picking peaches when I crossed the school.
Eg:
When I came into classroom, I heard someone sing.
3、动词-ing 形式也可以用在使役动词have\ get\ leave\ keep\set\ send 等动词后作宾语补足语。
(宾语与作宾补的现在分词之间存在逻辑上的主谓关系，即宾语是现在分词动作的发出者。)
Eg:
Don' thave your students dnogi homework all the time.
五、动词-ing 形式做定语
1、表示被修饰词的某种用途,一般放在所修饰词的前面。
阅览室reading room 吸烟室smoking room
洗衣机washing machine 写字台writing desk
3、起形容词作用的动词-ing 作定语时，含有主动和进行的意思。
(1)单个的分词放在所修饰名词的前面
Eg:
I walked quietly in order not to wake the sleeping bird.
(2)短语放在所修饰的名词后面
Eg:
I know the bird sleeping in the tree. ------- I know the bird which is sleepingin the tree.
Eg:
It lived in a tree facing my house. -------- It lived in a tree which faced myhouse.