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1.含義：表示現在正在進行或一段時間正在進行的動作国产精品国产成人国产三级。 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.句型轉換： He is playing basketball. Is he playing basketball? Yes, he is./ No, he isn’t. What is he doing? He is playing basketball. (責任編輯：admin) |
