被动语态一定要有介词吗His plays are known all over the world这是被动语句,那介词在哪?还有His plays are turned into wonderful films呢?

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被动语态一定要有介词吗His plays are known all over the world这是被动语句,那介词在哪?还有His plays are turned into wonderful films呢?
被动语态一定要有介词吗
His plays are known all over the world这是被动语句,那介词在哪?还有His plays are turned into wonderful films呢?

被动语态一定要有介词吗His plays are known all over the world这是被动语句,那介词在哪?还有His plays are turned into wonderful films呢?
其实没有必要这么较真,被动语态表示被动,从理论上来说是“被..."肯定要有介词,但是被的对象不明确的话就没有必要写出来.His plays are known all over the world.=His plays are known by the world.
His plays are turned into wonderful films.这句话”被...”省略掉了,完整应该是:His plays are turned into wonderful film by sb.

不一定要有介词。
His plays are known all over the world.
他的剧作闻名于世界。
His plays are turned into wonderful films.
他的剧作变成了电影。

不一定呗

over是该句的介词
into是借此
被动语态不一定有介词,例如i was hurt

本来应该是
his plays are known by everyone all over the world .
his plays are turned into wonderful films by some directors
其中的by 就是介词
这里的by someone 很多情况下可以省略
所以不一定要介词

被动语态不是一定要有介词的