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thatisapen怎么改成否定句
thatisapen改成否定句为Thatisn&#39t,在thatis的is后面加not就是否定形式。thatis在英语中很常见,例如:thatisanapple.那是一个苹果。thatisn&#39tatomato.那不是西红柿。thatisapencil.那是一个根铅笔。thatisn&#39tap...
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