learning aim:review the passive voice difficult and important point:the usage of the passive voice 时态 动词的被动形式 例句一般现在时 he is asked to do this. 一般过去时 the story was told by her mother. 一般将来时 the problem will be discussed tomorrow. 现在进行时 the novel is being written. 过去进行时 at that time the desk was being made. 现在完成时 the house has been built. 过去完成时 they said that their work had been finished. 过去将来时 he said the trees would be planted soon.
