
鸭子居住的地方: pond,marsh,ocean 鸭子的身体部分: beak,webbed foot,feather, wing 鸭子的动作: get food,fly, swim, waddle 可数名词复数的不规则变化,例如: foot--feet 动词的一般现在时第三人称单数形式,例如: get-gets 不定冠词a的用法,例如: a duck; 定冠词 the 的用法,例如: theocean To be 句型,例如: All ducks are alike in many ways. To have 句型,例如: Ducks have webbed feet. 一般现在时的用法,例如:Feathers keep them warm and dry.