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¡¡¡¡½á¹¹£ºÖú¶¯´Ê be ( am / is / are ) +ÏÖÔÚ·Ö´Ê.

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¡¡¡¡Eg: carry-carrying,catch-catching,drink-drinking, enjoy-enjoying hurry-hurrying ,do-doing , read-reading , think-thinking

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¡¡¡¡Èçcome-coming , have-having , make-making,ride-riding,write-writing,take-taking,use-using£®

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¡¡¡¡È磺 hit-hitting,let-letting, put-putting,run-running,sit-sitting£®

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¡¡¡¡Èç: for¡®get-forgetting,pre¡¯fer-preferring,up¡®set-upsetting£®ÊÔ±È½Ï ¡¯benefit/benfiting, ¡®differ/differing,¡¯profit/profiting,ÕâЩ´ÊµÄÖØÒôÔÚµÚÒ»¸öÒô½ÚÉÏ,Òò´ËÆäĩβµÄ¸¨Òô×Öĸ²»Ë«Ð´£®

¡¡¡¡5. ÒÔ -ic ½áβµÄ¶¯´Ê,Ó¦ÏÈ°Ñ -ic ±äΪ -ick,ÔÙ¼Ó -ing,eg: panic/panicking,picnic/picnicking,µ« lie/lying ,die/dying,tie/tyingÊÇÌØÊâ±ä»¯Òª¼Çס£®

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¡¡¡¡I am singing . They are writing .

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¡¡¡¡I am not singing . They aren¡®t writing .

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