怎么判断句子是主动还是被动
“developed“前是被动语态，in the Anti-Japanese War 是状语，against the kuomintang's reactionary rule是修饰the Anti-Japanese War的定语
造两个英语从句。
一个句子含主动和被动。
5）短语动词是不可分割的整体，改为被动语态时要保持其完整性，介词或副词不可遗漏。
如： We must take good care of the young trees．→The young trees must be taken good care of． 6）含有宾语从句的主动结构变为被动结构时，通常用it作为被动结构的先行主语，从句放在句子后面；也可采用另一种形式。
可以这样转换为被动结构的动词有know，say，believe，find，think，report等。
如： People believe that he is ill．→It is believed that he is ill．（或：He is believed to be ill．） 3．被动语态改为主动语态的方法： 被动语态中介词by后的宾语改为主动语态中的主语（或按题意要求确定主语），按照这个主语的人称和数以及原来的时态把谓语动词形式由被动语态改为主动语态。
注意在主动语态中有的动词要求不带to的动词不定式作宾语补足语，此时要把被动语态中的to去掉。
被动语态的主语用来作主动语态的宾语。
如： History is made by the people．
用主动，被动形式填写句子
被动形式:1.Our room must be made clean.2.I'd like to buy that coat.I'm sorry.It is sold out.3.The key must be laid on the table when I leave.4.Doctors are needed in every part of the world.5.His new book is due to be published next month.(:
求一般现在时的被动和主动语态的句子
虽然不太明白你的，望下面成对的句子帮你理解主动语态动语态在一般现在时中的同义句意表达要求： 主动态 He often helps others. 被动态 Others are often helped by him 主动态 Teachers usually ask us questions. 被动态 We are usually asked questions by teachers 或Questions are usually asked to us by teachers 主动态 My mother cooks dilicious food every day. 被动态 Dilicious food is cooled by my mother every day. 主动态 He can speak English well. 被动态 English can be spoken well by him. 主动态 I buy three suits of clothes for myself every year. 被动态 Three suits of clothes are bought by me for myself every year. 主动态 He drives guests everywhere many times a day. 被动态 Guests are driven everywhere by him many times a day.
请问下面这句句子是主动还是被动
这里只能理解成is后面跟了一个状态，不过在牛津里，只有vn的解释，这种话因为有前后语境在日常口语中是不会有歧义的，因为不可能在一所学校里学24年的，，，如果这是在文章里的，我的观点觉得这是一句病句，，，
主动句变被动句
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。
