when cooking supper 是什么时态啊?when cooking supper ,we heard someone is knocking at the door 上面是错的啊,we heard a knock on the door 我想知道为什么不用knocking 有没人知道?
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![when cooking supper 是什么时态啊?when cooking supper ,we heard someone is knocking at the door 上面是错的啊,we heard a knock on the door 我想知道为什么不用knocking 有没人知道?](/uploads/image/z/10652645-29-5.jpg?t=when+cooking+supper+%E6%98%AF%E4%BB%80%E4%B9%88%E6%97%B6%E6%80%81%E5%95%8A%3Fwhen+cooking+supper+%2Cwe+heard+someone+is+knocking+at+the+door+%E4%B8%8A%E9%9D%A2%E6%98%AF%E9%94%99%E7%9A%84%E5%95%8A%EF%BC%8Cwe+heard+a+knock+on+the+door+%E6%88%91%E6%83%B3%E7%9F%A5%E9%81%93%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E7%94%A8knocking+%E6%9C%89%E6%B2%A1%E4%BA%BA%E7%9F%A5%E9%81%93%EF%BC%9F)
when cooking supper 是什么时态啊?when cooking supper ,we heard someone is knocking at the door 上面是错的啊,we heard a knock on the door 我想知道为什么不用knocking 有没人知道?
when cooking supper 是什么时态啊?
when cooking supper ,we heard someone is knocking at the door
上面是错的啊,we heard a knock on the door 我想知道为什么不用knocking 有没人知道?
when cooking supper 是什么时态啊?when cooking supper ,we heard someone is knocking at the door 上面是错的啊,we heard a knock on the door 我想知道为什么不用knocking 有没人知道?
可以用KNOCKING,但是要去掉IS
hear sb do/doing sth
hear a knock也是对的,只是knock在这里是名词,上面是动词,词性变了,都是对的
这题是过去式,由谓语动词的HEARD 可以看出
前面是个时间状语从句,原句是when we were cooking supper.
当从句的主语和主句的主语相同时,可以省去从句中的主语和谓语动词.所以不要WE WERE.
不对,is去掉就行了 ,过去进行时
不可以
when cooking supper做伴随时间状语
when cooking supper , we heard someone knocking at the door 。一般过去时。
we heard someone is knocking at the door 有两个谓语动词heard和is
语法错误了
去掉is knocking ...
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不可以
when cooking supper做伴随时间状语
when cooking supper , we heard someone knocking at the door 。一般过去时。
we heard someone is knocking at the door 有两个谓语动词heard和is
语法错误了
去掉is knocking at the door 作宾语补足语
we heard a knock on the door 此时knock作名词
we heard someone knocking at the door 也可以 表示那个时候正在敲。
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应去掉is,原因有两个:一是时态不对,应用过去式;但即使用过去式也不行,因为hear sb. doing sb.是地道用法。只有当hear表示听说的意思时,才用hear that...
可以