第1个回答 2022-06-24
将一个英语句子改为被动语态时，先找出句子的宾语，将其作为句子的主语，把原谓语动词改为be＋过去分词（保持原句的时态）然后加上by＋原来的主语。如：They have caught a thief. (他们抓住了一个窃贼。）把宾语a thief 作主语，保持现在完成时。A thief has been caught by them. ( 一个窃贼被他们抓住了。）
第2个回答 2022-06-24
将一个英语句子改为被动语态时，先找出句子的宾语，将其作为句子的主语，把原谓语动词改为be＋过去分词（保持原句的时态）然后加上by＋原来的主语。如：They have caught a thief. (他们抓住了一个窃贼。）把宾语a thief 作主语，保持现在完成时。A thief has been caught by them. ( 一个窃贼被他们抓住了。）
第3个回答 2020-08-09
陈述问：The wolves killed a young deer. 改为被动语态: A young deer was killed by the wolves.
第4个回答 2020-08-10
主动语态→被动语态：
1、找到该句宾语（必须是在谓语动词后的）,将它提到句子开头.
2、用被动语态结构be+Vt过去分词构成句子.
3、把原句的主语用by构成的介词短语带出,也可不加.
eg：I finished my homework yesterday.
→My homework was finished (by me) yesterday.
特殊形式：
1、部分Vi加上适当介词可当作Vt构成被动语态.
eg：Parents look after their children carefully.
→Children were looked after (by parents) carefully.
2、联系动词没有被动语态.eg：The water feels warm.
3、在主动语态中一些省略to的动词不定式改为被动语态时需加上to.
eg：Teachers often make him stand outside.
→He is often made to stand outside (by teachers).
4、have、let等动词无被动语态.
必要时,have可改为held,let sb to do sth可改为be allowed to do sth (被允许做某事）.