如何将主动语态转换成被动语态
编者按：将主动语态转换成被动语态时将主动句的宾语变成被动句的主语，原来的主语药用by引出来。下面小编就来带你一起学习下主动语态转换成被动语态的3个要求吧。
将主动语态转换成被动语态有3个要求：
1.将主动句的宾语变成被动句的主语。
2.将谓语改成被动式：be+过去分词。
3.原句的主语用by引出来，放在谓语后面。如果不需要，可以省去。
主动句：Class 3 defeated Class 1.
三班打几了一班。
被动句：Class 1 was defeated by Class 3.
一班被三班打败了。
注意点：
1.对于有双宾语的主动句，可以将当中任何一个宾语移到前面作主语，另一个宾语留在原来的位置上：
主动句：Father gave me a watch.
爸爸给了我一块表。
被动句：I was given a watch by father.
我被我爸送了一只表。
A watch was given (to) me by father.
一只表被我爸送给我。
主动句：She passed him a phone.
他递给他一个手机。
被动句：He was passed a phone.
他递给一个手机。
A phone was passed (to) him by her.
一只手机被她递给他。
2.在把带宾补的主动句变成被动句时，宾补的位置不动，这时的宾补其实是补充说明主语的主语补足语了。
例如：
主动句：We elected Jim monitor.
我们选举杰姆当班长。
被动句：Jim was elected monitor by us.
杰姆被我们选举为班长。
特别注意：
如果句子中含有不带to的不定式作宾语补语，变成被动句时，必须把不定式符号to加上：
主动句：His father made him work hard.
他父亲迫使他下功夫。
被动句：√He was made to work hard by his father.
他被他父亲逼迫去下功夫。
╳Hewas made work hard.
主动句：The guard let the children pass.
卫兵让小孩通过。
被动句：√The children were let topass.
小孩让通过。
╳The children were let pass.
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