Whats this?,这个是什么？,Unit 4,What什么,is是,this这个,that那个,no不,Whats是什么,Its它是,it它,is是,What this?,It a dog.,Whats this?,It a cat.,What that?,It an apple.,Whats that?,It an egg.,注意：以 a e i o u 五个元音字母开头的单词前用“an ”表示“一个”，其他用“a”. a dog an apple,一个男孩,a an boy,一条鱼,a / an fish.,Its,一个女孩,a / an girl,一只狮子,a / an lion.,Its,一只老虎,a / an tiger,Its,一只兔子,a / an rabbit.,Its,一个橘子,a / an orange.,Its,一个梨子,a / an pear,Its,It a cat.,Mom, what this?,It a cat.,Mom, what this?,Is this a cat?,No, it isnt. It s a tiger.,Look! Whats that?,Is that a lion?,Yes, it is.,
