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)