This is an apple in English.的答句是什么

This is an apple in English.的答句是什么 is this an apple an orange__an egg This is an apple就an apple部分转换提问 this is an apple.改成复数形式 This is an apple 变为复数句子 an,is,apple,this连词成句 There is an apple in his hand there is an apple in the tree . Hi,Alice!What's this in English?This is an apple.请告诉我这句话哪里错了! this is an apple 和 this is apple 哪个语法是正确的 this is an apple中为什么要用不定冠词不用可不可以,能不能写成This is apple These are an apple and a pear.还是This is an apple and a pear. this is an apple怎么改为复数句 This is （an apple）对括号部分提问 This is an apple,that's a knife句型转换 This is (an apple)打括号的地方提问 This is an red apple.(哪里错了) This is an red apple.写出正确的句子