am的否定形式,否定的英文

动词构成 be v-ing 肯定式:am/is/are 现在分词-ing am/is/are
1 travelling 同步素材(牛津译林八年级下册)
be动词(am/is/are)的一般现在时和一般过去时,请看下表
be动词:am is are 二,肯定句,否定句,一般疑问句和特殊疑问句定义 1
is she's we are we're it is it's they are they're 否定形式的