新东方考研语法讲堂45

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（一）助动词be的用法
    1、跟现在分词构成各种进行时态：
    They are playing war games with toy guns and toy tanks. 他们正在用玩具枪和玩具坦克玩战争游戏。
    We were playing video games on TV last night. 昨晚我们在电视上玩电子游戏。
    2、跟过去分词构成被动语态：
    He’s not respected by the press. 他们不受报界的尊重。
    We were taught how to use a computer last year. 去年教过我们怎样用计算机。