动词不定式肯定形式和否定形式

问题描述:

动词不定式肯定形式和否定形式

以下是动词不定式肯定形式和否定形式的例句:(1) 三个动词不定式肯定To work out this difficult problem in three days is impossible =It is impossible to work out this difficult problem in three daysTo lea...