被动变主动：The classroom is being cleaned.（the students作主语）

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• 被动语态有 宾语么?The classroom was cleaned (by us/students).My homework has been finished.Many trees were planted on the hill yesterday.被动语态里面的动词,应该都是及物动词,既然是及物动词,一般后面都是要跟宾语的,但在被动语态的句子中 看到,动词后面要么,不跟宾语,要么是跟一个by 短语（引出动作执行者）.是不是被动语态中,尽管是及物动词,但后面不需要跟宾语啊?我知道被动语态的主语,放在主动语态里面,是做动词的宾语.这样的用法,是不是可以当作固定用法来记忆了.
• 主动句 变被动句 ask the students to make a dialogueask the students to make a dialogue那个是主语放在前面?怎么转换?
• 主动语态变被动语态一、 把下列句子变成被动语态：1.They used recorders in English class.2.Have you posted the letters yet?3.Can you do it tomorrow?4.They must build another house to live in.5.He is writing a book for children.6.The teacher told the children a story.7.He will give you an excuse when you ask him to help you.二、 把下列句子变成主动语态（用括号里的词作主语）：1.This song is often sung.(girl)2.These photos were taken on the Great Wall.(Mr.Brown)3.The room is being cleaned.(the boys)4.A sh
• 被动语态变主动语态spanish is spoken in south America(people) the homework must be finishhed(the students） All the new worlds mustbe looked up in a dictionary(we) has john's room been cleanedalready?(john's sister) a big cake was given to linda by her friendfor her birthday this song is often sung now(many children) we are being taught how to use the newmachine (the worker)
• 被动变主动：The classroom is being cleaned.（the students作主语）
• The teacher asked more ______to prevent the students’ eyes from being injur可是我们学不定式作定语修饰名词时,要是不定式何所修饰名次构成动宾并和句子主语是主谓关系不定式用主动表被动呀
• 将主动语态变被动语态、被动语态变主动语态.1.The students clean the classroom every day.2.Mary's room must be kept clean.3.She gave me twenty yuan last week.4.Hangzhou produces silk.5.I saw a man go into the room just now.还有3道题目：1.You can't see the stars in the daytime.2.A present was bought for me by my sister.3.Must I do all the exercises?如果能写出每个句子的（主谓宾）就更好了。
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