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师梦圆初中英语教材同步人教版九年级全一册Section A Grammar focus 4a—4c下载详情
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内容预览

be + 过去分词(PP) + (by …)

am/is/are + pp

was (were) + pp

will (shall) /be going to + be + pp

must (can, have to, may等) + be + pp

have/has been +pp

在改写中应注意:

1.把原来的宾语提到前面作被动语态的主语;

2.把动词变成“be + 过去分词”;

3.主动语态中的主语变为介词by的宾语。

4.遵循时态不变的原则

变化过程 例1 将下列句子改为被动语态。 We clean our classroom every day. Our classroom is cleaned (by us) every day.

一般现在时的被动语态:

am/is/are + 过去分词

People play football all over the world.

2. Mr. Green teaches us this term.

Football all over

the world.

We this term.

is played

are taught by Mr. Green

(by people)

一般过去时的被动语态:

was/were + 过去分词

3. People built the Great Wall long ago.

4. Two years ago we used the machines to make shoes for children.

The Great Wall

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