1.动词不定式的形式
时态 主动态 被动态
一般式 to do to be done
进行式 to be doing
完成式 to have done to have been done
完成进行式 to have been doing
例1:John said that he had run in order to catch the bus. (一般式的主动态)
例2:He hated to be misunderstood by others. (一般式的被动态)
例3:He pretended to be listening attentively. (进行式)
例4:He intended to have told you that. (完成式主动态)
例5:This work of art seemed to have been created several centuries ago. (完成式的被动态)
例6:We’re happy to have been working with you. (完成进行式)