介词
①放在_____词后作表语
③放在“___语+___语+___语”结构后，作状语或者宾补
②放在_____词后作_____定语
2.介词短语在句中位置：
圈出以下句子中介词，再划出介词短语
① My dictionary is in the bag.② The pen on the table is blue.③ We can find information by using computers.④ I found him at the bus station.
1.介词位置：可放在__词、____词之前，组成介词短语。
名
动名
即动词ing
系动
系表结构（介词不能单独作谓语
名
后置
主
谓
宾
介词主要分类：
1. at the cinema, in the hospital  __________2. Write with a pen, go by bus   ___________ 3. in summer, on September 1st  ___________4. laugh for joy, be angry at his words________5.  ...