2015英语四级语法：各种时态下的被动语态

　　虽然四级考试中并没有语法题，但语法却是每个题型都需要的重要存在。因此，新东方在线英语四级频道为大家带来一系列语法的学习指南。

　　不知道你们有没有这样一种语法困扰，那就是——被动语态。虽然看似不难，但每次一碰到相关选项就各种犯错。

　　为了防止大家错误重演，今天就带大家看看被动语态的正确用法吧!

　　首先，被动语态由be+过去分词构成，be随时态的变化而变化。

　　下面我们以give为例，各种时态的被动语态形式为：

　　一般现在时：am/is/are+given

　　The first section of New College English is designed for speaking practice and is based on pictures and topics.

　　一般过去时：was/were+given

　　These computers were made in our own country.

　　一般将来时：will/shall be+given

　　Shall we be asked to attend the opening ceremony?

　　过去将来时：would be+given

　　The news would be sent to the soldier's mother as soon as it arrived.

　　现在进行时：am/is/are being+given

　　The machine is being repaired in the workshop. The fifth generation computers, with artificial intelligence, are being developed and perfected now.

　　过去进行时：was/were being+given

　　The feast was being prepared when the birds arrived in the sky

　　现在完成时：has/have been+given

　　Swift progress has also been made in culture and education.

　　过去完成时：had been+given

　　The huge bridge had been damaged before the World WarⅡ.

　　将来完成时：will/shall have been+given

　　The book will have been published by the end of next month.