双重彼动式：主语+被动式谓语+不定式的被动式+其他成分
用不带to的不定式作宾补的感官动词和使役动词，感官动词和使役动词在被动语态中的宾语补足语to要带上
常用动词有：see，hear，have，watch，notice，help，feel等，用于这类被动结构的短语动词最多见的是“动词+名词+介词”这一结构
一般现在时am/is/are+done
如：English is widely used in the world
一般过去时was/were+done
如：We were asked to help them
一般将来时will/shall+be done
如：A class meeting will be held next Monday
过去将来时should/would+be done
如：She said those flowers should be watered
现在进行时is/am/are+being done
如：The blackboard is being painted now
过去进行时was/were+being done
如：Those flowers were being watered when I left
现在完成时have/nas+been done
如：Allthese flowers have been watered
过去完成时had+been done
如：The building had been completed before I arrived
含情态动词，情态动词+be done
如：These books may be kept for two weeks
含双宾语，变其中一个，大多把表示人的间接宾语变为主语
如：He was given some books=Some books were given to him
