被动语态总公式:be+过去分词(done) 一般现在时 am(is,are)+done 一般过去时 was(were)+done 一般将来时 shall(will) be+done 现在进行时 am(is,are)being done 过去进行时 was(were)being done 过去将来时 would be done 现在完成时 have (has) been done 过去完成时 had been done 将来完成时 will have been done 过去将来完成时 would have been done