英语句子表达形式的转换!Whatpromptedsuchbloodyprotests?Thetriggerwasatradedeal.这个由what作主语的问句可不可以改成被动的形式:whatdidsuchbloodyprotestsbepromptedby?

Question

英语句子表达形式的转换!
What prompted such bloody protests?The trigger was a trade deal.
这个由what 作主语的问句可不可以改成被动的形式:
what did such bloody protests be prompted by?

Answer 1

被动语态的谓语动词要用“助动词be + 过去分词 prompted”,把原来的宾语 such bloody protests 改为主语,原来主语 what 用介词短语 by 引入,即：



By what were such bloody protests prompted?



口语中往往要把 by 后置,说成



What were such bloody protests prompted by?



Were … prompted by 已经是表示过去的被动语态,不能用 did … be prompted by.