一、被动语态过去式怎么表达
被动语态的基本结构为：be+done.
根据主动语态不同时态不同。具体如下：
一般现在时
主动： Sb. do/does sth. eg: I do my homework./ He does his homework.
被动：Sth. am/is/are done(by **.). eg: Homework is finished by me.
一般过去时
主动： Sb. did sth. eg: I did homework./ He did homework.
被动：Sth. was/were done(by **.). eg: Homework was done by me.
现在进行时
主动： Sb. am/is/are doing sth. eg: I am doing my homework./ He is doing his homework.
被动：Sth. am/is/are being done(by **.). eg: Homework is being done by me.
过去进行时现在完成时
主动： Sb. was/were doing sth. eg: I was doing my homework.
被动：Sth. was/were being done(by **.). eg: Homework was being done by me.
现在完成时
主动： Sb. have/has done sth. eg: I have finished my homework./ He has finished his homework.
被动：Sth. have/has been done(by **.). eg: Homework has been finished by me.
过去完成时
主动： Sb. had done sth. eg: I had finished my homework./ He had finished his homework.
被动：Sth. had been done(by **.). eg: Homework had been finished by me.
一般将来时
主动：Sb. will do sth. eg: I will do my homework.
被动： Sb. will be done. eg: Homework will be done by me.
过去将来时(少用)
主动：Sb. would do sth. eg: I would do my homework.
被动： Sb. would be done. eg: Homework would be done by me.
Hope my explanation will help you.
二、请问过去时的被动语态和过去式有什么区别
被动语态是be+过去分词，过去式只是动词的过去式，分为被动语态的过去式（be+过去动词）和主动语态的过去式（直接用过去动词）两种情况。二者在表示方式、含义、构成方面有区别：1、表示方式不同：一般过去式的动词通常用动词的过去式形式来表示，而动词的过去式是在动词原形的基础上变化的。动词的过去式可分为规则动词和不规则动词。被动语态由“助动词be+及物动词的过去分词”构成。被动语态的时态变化只改变be的形式，过去分词部分不变。疑问式和否定式的变化也如此。例如：主：He bought his children some pens.他给孩子买了钢笔。被：Some pens were bought for his children by him.他给孩子买了钢笔。
2、含义不同：被动语态(passive voice)是动词的一种形式，用以说明主语与谓语动词之间的关系。英语的语态共有两种：主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。过去式（past tense）是英语语法的一种，表示过去某个时间里发生的动作或状态。一般过去式的动词通常用动词的过去式形式来表示，而动词的过去式是在动词原形的基础上变化的。动词的过去式可分为规则动词和不规则动词。3、过去式的表达构成不同：被动语态由“助动词be+及物动词的过去分词”构成。被动语态的时态变化只改变be的形式，过去分词部分不变。疑问式和否定式的变化也如此。例如：Mr. Smith bought a new car yesterday.（史密斯先生昨天买了一辆新车。）The car was made in China这车是中国造的。
三、一般过去式的被动语态
一般过去时的被动语态的基本结构是：be动词的过去式（was、were）+动词的过去分词+其他形式。其表示过去某一时间的被动动作或过去经常性、习惯性的被动动作。
1、肯定句
结构：主语＋was/were＋动词过去分词＋其他
A new shop was built last year.
去年新建了一家商店。
2、否定句
结构：主语＋was/were＋not＋动词过去分词＋其他
The computers were not bought last week.
上周没有买电脑。
若句子中含有双宾语，在改为被动语态时，遵循以下方法：
1、将间接宾语转化为句子主语。
She gave the little girl some flowers．
她给了那个小女孩一些花。
2、将直接宾语转化为句子主语，此时间接宾语前通常加上介词to或for。
例：They bought the children many good books.
他们给那些孩子买了许多好书。
四、被动语态和过去式有何不同呢
被动语态和过去式是两个不同的语法概念。
被动语态（Passive Voice）：被动语态用于描述动作的承受者是谁，而不强调动作的执行者。在被动语态中，动作的接受者成为句子的主语，而动作的执行者通常通过介词"by"引出或省略。被动语态的构成是"be"动词的适当形式加上过去分词。
例如：
主动语态：The cat chased the mouse.（猫追逐老鼠。）
被动语态：The mouse was chased by the cat.（老鼠被猫追逐。）
过去式（Past Tense）：过去式用于表示发生在过去的动作、**或状态。它表示在过去某个特定时刻或时间段内发生的事情。过去式的构成通常是在动词原形后加上"-ed"（规则动词）或根据不规则动词的变化方式进行变化。
例如：
过去式：I walked to school yesterday.（昨天我走路去学校。）
需要注意的是，被动语态和过去式可以同时出现在同一个句子中。被动语态只是一种语态的变化形式，而过去式则表示动作发生的时间。因此，在某些情况下，一个句子可以同时具有被动语态和过去式的特征。
例如：
被动语态和过去式的结合：The cake was eaten by him.（蛋糕被他吃掉了。）
