教我"被动语态"怎么用

越详细越好,满意的话可以多加点积分
各位英文好的哥哥姐姐弟弟妹妹帮帮忙!谢谢拉!
被动语态形式：Be+done
1. am/is/are+done
2. was/were+done
3. have/has+been done
4. had +been done
5. shall/will +be done
6. can/may/should +be done
7. am/is/are+being done
8. would be done
9. will have been done
10. see sb. do sth

英语中及物动词有两种语态，即主动语态和被动语态。主动语态表示主语是动作的执行者被动语态表示主语是动作的承受者。被动语态由“助动词be+及物动词的过去分词”构成。助动词be有人称、时态和数的变化。

一、 被动语态的用法：

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.

I am asked to study hard.

Knives are used for cutting things.

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.

Dinosaur eggs were laid long long ago.

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.

Many man-made satellites have been sent up into space by many countries.

4. 一般将来时的被动语态构成：will+ be + 及物动词的过去分词

A new hospital will be built in our city.

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.

Your mistakes should be corrected right now.