(一). 不定式和动名词作主语

I. 不定式作主语时,可以用it作形式主语.

1. It is important ______ Tom to get that job. 2. It is kind ______ you to help me with my English.

for

of

总结: It is +adj.+for/of sb to do sth的结构中,若此形容词是说明的是不定式的性质时, 则用_____; 若说明的是人(sb.)的特性, 则用_____.

It is nice___ you to help me with my English. 2. It is necessary ________you to improve your spoken English.

of

for

for

of