雅思写作核心语法知识汇总（三）

C:非谓语动词归纳总结
在英语中，不做句子谓语，而具有除谓语外其他语法功能的动词，叫做非谓语动词。非谓语动词有动词不定式To do, Ving和Ved三种。
（一）不定式：不定式由不定式符号to加动词原形构成，及物动词的不定式可以带宾语。不定式的否定结构是在to前面加上not.不定式在句中可以做除了谓语外的任何成分。不定式一般在写作中可以做主语，宾语，后置定语，目的状语，宾语补足语和插入语。
1（主）不定式做主语，一般用it当形式主语，把做主语的不定式短语后置。
It is vitalto receive education in this ever-accelerated society.
It is no exaggerationto say that friendship is to people what perfume is to flowers.
2（宾）
I preferto choose the latter for the following reasons.
In this way, children can learnto cooperate with others.
3（后置定语）
The deepest urge in human nature is the desireto be important.
The important thing in life is the determinationto attain a great aim.
4（目的状语）
To associate with friends, we should be honest and open.
To achieve happiness, one has a long way to go.
5（宾语补足语）
Difficulties train oneto be great.
The updating society requires peopleto accept new things positively.
6（插入语）
To start with, the eye-catching development of technology is a good case in point.
Needless to say, we can never do without media.
（二）V-ing:V-ing由动词加ing构成，及物动词的ving可以带宾语。ving在句中可以做除了谓语外的任何成分。ving一般在写作中可以做主语，宾语，定语，状语，和插入语。
1做主语：Helping othersis happiness in itself.
Losingcan be a real beginning.
2做宾语：Change requiresadapting oneself to a new environment.
Reading a book is likeopening a window to the outside world.