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被动语态是动词的一种特殊形式，一般来说，只有需要动作对象的及物动词才有被动语态。汉语往往用"被"、"受"、"给"等被动词来表示被动意义 。被动语态由“助动词be+及物动词的过去分词构成。被动语态的时态变化只改变be的形式，过去分词部分不变。疑问式和否定式的变化也如此。 1. 一般现在时的被动语态构成：is / am / are + 及物动词的过去分词 Our classroom is cleaned everyday. 2. 一般过去时的被动语态构成：was / were + 及物动词的过去分词 A new shop was built last year. 3. 现在完成时的被动语态构成：has / have + been + 及物动词的过去分词 This book has been translated into many languages. 4. 一般将来时的被动语态构成：will+ be + 及物动词的过去分词 Many more trees will be planted next year. 5. 含有情态动词的被动语态构成：情态动词+ be + 及物动词的过去分词 Young trees must be watered often. 6. 现在进行时的被动语态构成：am / is / are + being + 及物动词的过去分词 Uncle Wang is mending my bike now.→ My bike is being repaired by Tom now. 7. 不定式的被动语态：to + be + 及物动词的过去分词 There are two books to be read. → There are twenty more trees to be planted. | 
