1. prepare sth,vt.
prepare for sth. vi.
2. e.g.
The teacher is preparing a lesson plan right now.
在备课
The students are preparing for the coming mid-term exams.
同学们在复习迎考.在为……做准备：复习
Not:The students are preparing the coming mid-term exams.
不可这样说.在语法上没有错误：同学们在为即将到来的期中考试出题或正在进行作弊工作.