被动语态如何改主动语态?

被动语态如何改主动语态?

把主动语态改为被动语态，可以遵循以下几个步骤：
1. 把宾语变成被动语态中的主语；
2. 找出谓语动词，变成相应的被动。如：一般式变成be done。过去式变成was/were done；

3. 把主语变成介词by 的宾语；

4. 注意人称、时态和数的变化。

例：1. Bruce writes a letter every week. →A letter is written by Bruce every week.

2. Li Lei mended the broken bike this morning.→The broken bike was mended by Li Lei this morning.

3. He has written two novels so far.→Two novels have been written by him so far.

4. They will plant ten trees tomorrow.→Ten trees will be planted by them tomorrow.

5. Lucy is writing a letter now.→A letter is being written by Lucy now.

6. You must lock the door when you leave.→the door must be locked when you leave.

把主动结构改为被动结构时，要做如下的变动： （1）主动结构的宾语变为被动结构的主语； （2）主动结构的谓语动词有主动语态变为被动语态； （3）主动结构的主语变为介词by的宾语。by与宾语组成介词短语，放在谓语动词后。在行为的执行者无需说明或不必着重指出时，这个介词短语可以省略。 eg：chen often use a recorder in teaching english. a ceorder is often used (by chen) in teaching english.(by chen可用可不用，看说话的人的意图而定）