語態是動詞的一種形式，它用來表示句中主語同謂語動詞之間的關系。
　　英語有兩種語態，主動語態和被動語態，主動語態表示主語是謂語動詞動作的執行者，被動語態表示主語是謂語動詞動作的承受者。例如：
　　I have repaired the radio.
　　我修好了收音機。
　　The radio has been repaired.
　　收音機被修好了。
　　The students cleaned the classroom.
　　學生們打掃了教室。
　　The classroom was cleaned by the students.
　　教室被學生們打掃了。
　　被動語態的構成：
　　be + 過去分詞
　　A building was damaged by the storm.
　　暴風雨毀壞了一座建筑物。
　　Our plate was made in China.
　　我們的盤子是中國生產的。
　　My bike was stolen.
　　我的自行車被盜了。
　　常用的被動語態的時態變化如下，以 ask 為例：
　　一般 進行 完成
　　現在I am asked, I am being asked, I have been asked
　　過去I was asked,I was being asked,I had been asked
　　將來I shall be asked, I shall have been asked
　　過去將來I shall be asked
　　被動語態的疑問句是把助動詞提前到句首。
　　Has your TV set been repaired?
　　你的電視機修了嗎？
　　Was the kite broken?
　　風箏破了嗎？
　　Has the work been done?
　　工作結束了嗎？
　　被動語態的否定式是在助動詞后面加 not.
　　The letter has not been sent out.
　　信還沒有發出去。
　　The little boy has not been found out.
　　小孩還沒有找到。
　　The cap has not been mended yet.
　　帽子還沒有補好。
　　Their money has not been sent to them.
　　他們的錢還沒有送到他們手中。

來源:可可英語 http://www.ccdyzl.cn/cet6/201301/221957.shtml