Yes,I am/No,I am not
Yes,this is/No,this isn't求肯定否定的方法 通俗易懂点！肯定回答Yes，主语（I, you, he, she, this, that, these, those）+ 系动词（am, is, are）否定回答No，主语（I, you, he, she, this, that, these, those）+ 系动词（am, is, are）+ not