必修4-unit3-ing形式作表语、定语和宾补.docx

动词的-ing形式作定语、表语和宾语补足语作定语动词的-ing形式包括现在分词和动名词，有的可置于名词前，有的需要置于名词后。它们的形式相同，都可作定语，但两者之间是有差别的。1、 动名词作定语：表示被修饰词的某种用途（此时动词的-ing形式常置于被修饰词的前面）意为“作用”，相当于一个for引导的介词短语。 a walking stick (= a stick for walking= a stick which is used for walking) 拐杖 a washing machine (= a machine for washing= a machine which is used for washing) 洗衣机 a reading room (= a room for reading= a room which is used for reading) 阅览室 a measuring tape (= a tape