一、各种时态的被动语态
被动语态由be+过去分词构成，be随时态的变化而变化，高考对被动语态的考查通常从以下九种时态人手。
1．一般现在时
表示现在或经常发生的被动动作时，用一般现在时的被动语态。一般现在时的被动语态由am／is／are+及物动词的过去分词(+by+实施者)构成。
【考例1．The 01ympk Games ___________every four years. [北京市]
A are held B were held C．are holding D．will ho1d
[答案]A 。[解析]考查被动语态，根据句意，奥运会每四年举行一次可见须用一般现在时的被动语态，故排除了B、C、D。
In the art show，a lot of enjoyment __to foreign friends by the Chinese paintings．[沈阳市]
A． is giving B is given C will give D has given
[答案]B。[解析]本题考查被动语态，句中a lot of enjoyment是动作的承受者。在这次艺术展中，一些有趣的东西通过中国国画展示给外国朋友。
Today Chinese is becoming more and more popular. It ___________in. many schools around the world. [南京市]
A. teaches B. is teaching C. has taught D. is taught
[答案]D。[解析]考查被动语态。物作主语，一般要考虑被动语态。但如果动词指的是物的特性，不能用被动语态。