復數(shù)形式
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sheep復數(shù)形式單詞（sheep復數(shù)為什么不加s）
大家經(jīng)常遇到像policeman、man teacher、boy friend、grandchild、father-in-law、pass-by、gentleman- farmer…
大家經(jīng)常遇到像policeman、man teacher、boy friend、grandchild、father-in-law、pass-by、gentleman- farmer…