prepare sth.表示"准备......",后接名词或代词作宾语。
Our English teacher was preparing the lessons when I came into the office.我进办公室时,我们的英语老师在备课。
prepare to do sth.表示"准备做......"。
They were preparing to cross the river when it began to rain. 他们正准备过河,突然下雨了
The students are busy preparing for the final exam.学生们正在准备期末考试
run over 撞倒 run →ran→ run→ running → runner 赛跑的人
run after 追逐,追求 run away from 从..跑掉;逃避 run out (某物)被用完 run out of 用完(某物)
run into 无意间碰到,和..相撞excitement 激动;兴奋