is加动词ed是一般现在时；当主语是第三人称单数，一般现在时的被动语态谓语就是“is加动词ed”。
一般现在、过去时用be done, be有人称、时态和数的变化。
例句：
1、主动：The children gave the foreign guests a warm welcome.
被动：The foreign guests were given a warm welcome by the children.
孩子们热烈地欢迎外宾。
2、主动：People regard him as brilliant.
被动：He is regarded as brilliant by people.
人们认为他很有才华。
