jim and tom are brother 变否定句

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jim and tom are brother 变否定句
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it is an orange 对an orange提问
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he is 13(变负数)

加个sJim and Tom are brothers吉姆和汤姆是兄弟Jim and Tom is not a brother---------------------------is动词 (用于第三人称单数现在时)是(与-连用构成现在进行时;与-连用构成被动语态 are 动词 (用于第二人称单...