am,is,are 是be的变形.
句子中有他们时,否定句直接在他们的后面加not,并将句中的some 变成any.
疑问句则直接将他们提到句首,并将句中的some 变成any,末尾句号改为问号即可.
如：I am a boy.I am not a boy.Am I a boy?
They are eating.They aren't eating.Are they eating?
She is kind.She isn't kind.Is she kind?
加油.