分类：教育/科学-外语学习
问题：英语作业？被动语态ThemanthoughttobeafoolT 
  被动语态The man thought to be a foolThey say him to have been richHe tri not to have mixed up in politicsHe ordered the work to start at once
回答：Themanwasthoughttobeafool.主语是动作的承受者而不是发出者,用被动语态 y后不可接不定式,但它的被动语态后可接不定式 t作系动词,可代替be,后接过去分词表示被动,have无此功能。Heorderedtheworktobestartedatonce.不定式作宾语补语时,若与宾语是被动关系,要用不定式的被动形式。