摘要:助动词be要与新的主语保持单.复数一致,若主语和宾语是人称代词时.“格 应作相应的变化. 口诀:宾变主.主变宾.谓变be done时不变.数格必须随着变. The workers make machines in this factory. Machines are made by the workers in this factory. 注意:不及物动词没有被动语态. ㈣例句:

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