Question

主动句变被动句

1.They use a recorder in class.2.He writes some letters to his classmate.3.The boy turned on a light when he left.4.Dalian produces big ships.5.Farmers harvest rice in autumn.还有个问题，如果主语是students那该怎样变？嗯。。。如果你英语很好 我可不可以加你啊 留下QQ号:-)

Answer 1

　　主动句变被动句可按以下步骤进行。
　　1、主动句变被动句的实质是将主语和宾语的位置对调，动词由原来的形式变为be加上动词的过去分词。如不需要突出动作的执行者，也可不要by-词组。 They punished the criminal.----- The criminal was punished.
　　2．如果主动句带有情态助动词或半助动词，在变为被动句时，情态动词或半助动词保持不变，谓语动词由主动变为被动。
　　They should do the work at once.----- The work should be done at once.
　　They must have finished their work.----- Their work must have been finished.
　　He is likely to let you down.------ You are likely to be let down.
　　3、如果主句是双宾语结构，变为被动句时刻有两种形式：一种是以间接宾语作主语；另一种是以直接宾语作主语。
　　They offered him some assistance.----- He was offered some assistance.
　　4、如果主句的结构带有宾语补足语，变被动的时候要将原来的宾语补语变为主语补语。
　　We have painted the windows white.----- The windows have been painted white.
　　They elected Tom monitor of the class.---- Tom was elected monitor of the class.
　　5、当主动句变为被动句时，有时用by-词组，有时不用。一般来说，当施动者为谁不太清楚、不甚重要或不愿说出时，通常不用by词组。但有时为了强调施动者，则须用by词组。
　　Hamlet was written by Shakespeare.
　　Susan was cheated by David.
　　有时为了避免中途变更主语，不得不用被动句而把施动者置于by-词组中。

Answer 2

主动句变被动句可按以下步骤进行。
1、主动句变被动句的实质是将主语和宾语的位置对调，动词由原来的形式变为be加上动词的过去分词。如不需要突出动作的执行者，也可不要by-词组。 They punished the criminal.----- The criminal was punished.
2．如果主动句带有情态助动词或半助动词，在变为被动句时，情态动词或半助动词保持不变，谓语动词由主动变为被动。
They should do the work at once.----- The work should be done at once.
They must have finished their work.----- Their work must have been finished.
He is likely to let you down.------ You are likely to be let down.
3、如果主句是双宾语结构，变为被动句时刻有两种形式：一种是以间接宾语作主语；另一种是以直接宾语作主语。
They offered him some assistance.----- He was offered some assistance.
4、如果主句的结构带有宾语补足语，变被动的时候要将原来的宾语补语变为主语补语。
We have painted the windows white.----- The windows have been painted white.
They elected Tom monitor of the class.---- Tom was elected monitor of the class.
5、当主动句变为被动句时，有时用by-词组，有时不用。一般来说，当施动者为谁不太清楚、不甚重要或不愿说出时，通常不用by词组。但有时为了强调施动者，则须用by词组。
Hamlet was written by Shakespeare.
Susan was cheated by David.
有时为了避免中途变更主语，不得不用被动句而把施动者置于by-词组中。

Answer 3

1. A recorder is used by them in class .
2.Some letters are written to his classmate by him .
3.A light was turned on by the boy when he left .
4.Big ships are produced in Dalian .
5.Rice is harvested by farmers in autumn .