important to do/doing sth.

题目

important to do/doing sth.

答案

important to do sth.这个组合用于特定句式：It is important to do sth.表示做某事是很重要的,it 是形式主语,to do sth是真正的主语.而important to doing sth.这是词组 be important to ...的一种特殊形式,这里to ...