英语被动语态和主动语态的转换

很简单的,总之就是把动词换成过去分词,再在前面加上,的形式根据主语的数、人称和时态作相应改变即可.比如,I am punished today./She is punished today.这里am与is的区别就看前面主语是谁了.The flowers are watered...