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1.含义：表示现在正在进行或一段时间正在进行的动作。 2.构成：主语+be +V-ing+其他 He is reading a book. 3. V-ing 变化规则： 1)一般直接加ing . 如: play——playing watch——watching 2)以不发音的e 结尾,去e加ing. 如: take——taking come——coming 3)元+辅结尾,且是重读闭音节的单词,双写辅音字母加ing. 如: run——running swim——swimming 4.句型转换： He is playing basketball. Is he playing basketball? Yes, he is./ No, he isn’t. What is he doing? He is playing basketball. (责任编辑：admin) |
