mum made dumplings for us yesterday 改为否定句

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mum made dumplings for us yesterday 改为否定句
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mum made dumplings for us yesterday 改为否定句
mum made dumplings for us yesterday 改为否定句

mum made dumplings for us yesterday 改为否定句
mum didn't make dumplings for us yesterday.
这个是一般过去式改为否定句,在动词前加上助动词do 的过去式did+否定词not,然后把动词改为一般现在式