英语 句型转换 (7 14:32:17)You may go swimming after you finish your homework.（改为被动语态）His father asked him why he wanted an MP4.（改为直接引语）Some fish were caught by these fishermen yesterday.（改为主动语态）the book/somewhere/is/in/the house/put（连词成句）

①被动语态即指 be done（系动词+过去分词），主动语态和被动语态的关系类似于把字句和被字句，you finish your homework中，you是主语，your homework是宾语，所以在改动的时候，把主语变宾语，宾语变主语。
you may go swimming after your homework is finished .
②这句话中，直接引语变间接引语要变 人称 动词时态 还有标点。asked是主句里的，不改变时态；wanted是从句里的，改变时态，为want（具体参照初二下册课本）；另外，把 why he wanted an MP4改成疑问句，为 why did he want an MP4；然后改标点。
His father asked him：“ why did he want an MP4？”
③参见第一条
These fishermen caught some fish yesterday.
④我觉得，这个要靠个人积累的，以及语感的练习。多读读课文以及英语小短文很有用的（个人建议）
The book is put somewhere in the house.

被动句其实和中文里的被动句有些相似的。you may go swimming after your homework is finished .一般后面直接跟宾语（名词，动名词，如finshing代词）的动词都可以转换成被动语态。
His father asked him “why you wanted an MP4?”间接变之直接就是把所要问的东西用正在陈述的句子表示出来。
These fishermen caught some fish yesterday.把宾语和主语的为止换一下，然后对动词的形式加以改动就可以了。这里是鱼被捉，主动的话就是人抓鱼了。
The book is put somewhere in the house.这个句子就是被动语态，书被放在房子的某个地方。somewhere in the house,这个就当作一个常用的短语吧。介词短语修饰副词。 希望说的没有错误，也希望对你能有用。。。

1.You may go swimming after your homework is fininshed.
2.His father asked him,"why do you want an MP4?"
3.These fishermen caught some fish yesterday.
4.The book is put somewhere in the house.

You may go swimming after your homework are finished.
His father asked, "why you want an MP4?"
These fisherman caught some fish yesterday.
The book is put somewhere in the house.