作业帮什么时候用be动词提问,什么时候用助动词提问?实义动词是什么?
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/05/22 16:42:17
什么时候用be动词提问,什么时候用助动词提问?实义动词是什么?
就比如 did you serve this man?（你接待过这位男士么?）为什么要用did提问,不用were呢?
which books did you buy?(你买了哪本书?）问题同上
就比如 did you serve this man?（你接待过这位男士么?）为什么要用did提问,不用were呢?
which books did you buy?(你买了哪本书?）问题同上
主要在以下句型中：
在主系表句子中：主系表－－－系主表?He is a student.－－－Is he a student?
在现在与过去进行时态 中：主+be+动词ing+其他
The boys over there are playing basketball.－－－Are the boys over there playing basketball?
I was doing homework when the bell rang.----Were you doing homework when the bell rang?
在一般现在时或过去时的被动语态中：主+be+动词过去分词+其他
The car was invented in 1876.Was the car invented in 1876?
还有现在进行被动语态中
在主系表句子中：主系表－－－系主表?He is a student.－－－Is he a student?
在现在与过去进行时态 中：主+be+动词ing+其他
The boys over there are playing basketball.－－－Are the boys over there playing basketball?
I was doing homework when the bell rang.----Were you doing homework when the bell rang?
在一般现在时或过去时的被动语态中：主+be+动词过去分词+其他
The car was invented in 1876.Was the car invented in 1876?
还有现在进行被动语态中