用被动语态分别造一般现在时、现在进行时、一般过去式、现在完成时、过去进行时 、一般将来时各造一个句子
问题描述：
用被动语态分别造一般现在时、现在进行时、一般过去式、现在完成时、过去进行时 、一般将来时各造一个句子
答
一般现在时：am/is/are + v.过去分词 + by sb. e.g. Pens often are used by us.(原句 We often use pens.)现在进行时：am/is/are + being +v.过去分词 + by sb. e.g. Their classroom is being cleaned by ...