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？

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

cooking supper 翻译中文是? 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？ cooking cooking cooking Where is your mother?She is cooking supper in the _______ ( )my father was cooking supper when I _.A.got home B.got to home C.come home D.come to home当他干完家务活,他变得又饿又累When he finished _ the housework,he _ _ and _.He failed in the exam but he didn't c_ much about it.I fee supper supper my mother got ____(burn)when she was cooking yesterday Mary got ___ when she was cooking yesterday. She was cooking when she cut her finger Mom is always buzy cooking when I get home. 1.When did you have supper last night?怎么回答 The family ___(have) supper when l arrived. she often does her homework after supper 用when提问 Someone---at the door when Tom was having his supper? I'm hungry,when can we have the supper?