prepare to do =is going to do 准备做什么,打算做什么,表示将来时
be prepared to do 为什么做好准备,通常会加一些严肃滴话题,有实际意义
Zuma predicted South Africa will be prepared to host next year's World Cup games.
你可以说我准备去吃个饭prepare to have dinner,但是一般不会说我为吃饭做好准备,除非你那顿饭关系重大.╮(╯_╰)╭
混搭风：If I want success with the diet change I propose,I need to prepare to be prepared.