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    • 主语（人物）+be（is，am,are)+动词的现在分词+其他。用肯定。否定，疑问造句

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    第1个回答  2013-02-22
    肯定：I am looking for my watch.
    否定：She isn't reading an English book
    疑问：Are they playing football?
    第2个回答  2013-02-22
    He is studying English.
    Is he studying English?
    He isn't studying English.
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