what is it that is not poison?这句话语法是什么?

what is it that is not poison?这句话语法是什么? 这句话的语法结构?是什么It is what you do once 这句话语法上有错误么Sorry to say that it is certainly not the last tim it is not that big这句话的句形结构是什么, it is not that easy 中文是什么? 英语语法,请问that,it is ,what都是什么语法阿? why it is that what is so is so and what is not is not怎么翻译 “Is that a backpack?-No,it is not.”这句话哪儿错了? he is 、is not、are not、it is、what is 、that is、we are、she is、t what an interesting dolphin it is!这句话是什么句 Tell me what it is about .这句话是什么从句? what is it made of?这句话是什么时态?