尽最大努力处理这些问题是我们的责任。

　　The head teacher said it was necessary to talk with his mother.

　　校长说，和他妈妈谈一谈很有必要。

　　How to learn English well is important.

　　如何学好英语很重要。

　　To see is to believe.

　　眼见为实；百闻不如一见。

　　2. 用作表语

　　动词不定式作表语，常说明主语的内容、性质、特征。如：

　　The best way is to join an English club.

　　最好的办法是加入一个英语俱乐部。

　　The first thing is to listen to the teacher carefully.

　　首先是要认真听老师讲课。