mindmap root((介词省略)) 动词+地点名词 特定地点名词 home downtown abroad 时间状语中的介词省略 具体时间和日期 on Monday at 5 o'clock 介词+关系代词 介词移到从句末尾，关系代词省略 某些动词后面的介词省略 固定短语 enter the room approach the door 某些特定名词短语中的介词省略 表示距离、时间等概念 next Monday last night 双重介词的省略 方向性或空间表达 walk down the street jump onto the table 某些动词短语或固定表达中 Be busy (in) doing something Be worth (of) doing something Be capable (of) doing something Have difficulty (in) doing something Spend time (in) doing something Look forward to (in) doing something Be engaged (in) doing something