应为tooth是单数,teeth是复数.人都有好多牙齿,所以用复数；teeth是特殊变法,如feet
Her teeth are white为什么teeth不用tooth
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相关问题
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teeth tooth的正确用法
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Her --------are white and beautiful.A.face B.back C.teeth D.
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tooth和teeth哪个是复数?
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Brush her teeth,还是Brushes her teeth
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no 后面加tooth还是teeth
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teeth和tooth使用的区别是什么?
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we should clean( )twice day A our tooth B our tooths C teeth
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The baby has no teeth,so he can't eat hard food.为什么用teeth而不用
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Teeth are important. Strong, healthy teeth help you chew foo
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Teeth are important. Strong, healthy teeth help you chew all