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。 满意，请采纳，谢谢。