主动语态表示被动意义
1.表示内在品质或属性
open,lock,read,write,sell,clean,wash,draw,burn,cook
The pen writes very smoothly.
The sweater washses well.
2.需要值得类
want/need/require doing=want/need/require to be done
The colthes <font color="#c41230">reqeires washing=to be washed</font>
The TV<font color="#924517"> </font><font color="#c41230">needs repairing=to be repaired</font>
3.发生类
happen,take place<font color="#c41230">（没有被动）</font>
Great change have taken place in the past ten years.
The earthquake happened on May 12th.
4.起来类
sound,taste,smell,feel,look<font color="#c41230">（不用被动）</font>
5.感官使动类
感官类：look watch,see,hear,notice,listen to,help...sb do sth
I <font color="#c41230">heard </font>him talk in class=he <font color="#c41230">was heard to</font> talk in class.
使动类：let,make,have--to
Tom <font color="#c41230">made</font> him stay at home=He <font color="#c41230">was made to</font> stay at home.
用法
1.动作执行者是泛指
It<font color="#c41230">'s known</font> that all work and no play makes Jack a dull boy.
It<font color="#c41230">'s believed</font> that doing sports plays a important role in our life.
2.不知道或不必要说明动作的执行者
Tea,the most important drink <font color="#c41230">was invented</font> by accident.
3.强调动作的承受者
Book mustn't <font color="#c41230">be taken</font> away the reading room.
4.出于礼貌不想说出动作执行者
You <font color="#c41230">are invited</font> to the party to give a speech.
分类及构成
1.一般现在时 <font color="#c41230">Be+p.p</font>
I won't go to your party unless I <font color="#c41230">am invited</font>.
The song reminds me of my school as soon as it <font color="#c41230">is played.</font>
2.一般过去时 <font color="#c41230">was/were+p.p</font>
The photo <font color="#c41230">was taken</font> years ago.
When he<font color="#c41230"> was asked</font> why he was late,he just kept silent.
3.情态动词 <font color="#c41230">should/must/can/could/may...+p.p</font>
Your mobile phone shoud<font color="#c41230"> be turned</font> off.
4.一般将来时<font color="#c41230"> will be+p.p/be going to be+p.p</font>
Line 3 will <font color="#c41230">be finished</font> at the end of the year.
A talk will <font color="#c41230">be given</font> by Mr.Hu.
5.现在完成时 <font color="#c41230">have/has been+p.p</font>
He never forgets anything he has been told.
