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含含 BeBe 动词的陈述句变否定句动词的陈述句变否定句方法：方法：在 be 动词(am,is,are)后加 notis not=isntare not=arent1.He is a boy._2.I know they are students._3.My sister is a beatiful girl._4.My mother is a nurse._5.They are in the classroom._6.There are some books on the desk._7.This is the flag of Auetralia._8.Its the.!_ 9.This is a map of the._ 10.My uncle Zhiwei is a worker._11.I am a worker._