the students are collecting waste paper ____(raise)some money for charity

问题描述:

the students are collecting waste paper ____(raise)some money for charity
这个句子 我知道是填 to raise 就是凭语感 不定式做目的状语 但是现在我要让学生明白这里为什么要加TO 以及以后遇到那类的题 这个动词前要加TO呢 表目的呢?怎么举一反三?

用归纳法
He goes to school every day.
He goes to school to study everyday.
He goes to study everyday. 表示从低点到目的的转移
再加上强化记忆 就OK了