you used to be short,didn't you?为什么用didn't you?you used to be short,didn't you?为什么用didn't you?不用are't you

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you used to be short,didn't you?为什么用didn't you?you used to be short,didn't you?为什么用didn't you?不用are't you
you used to be short,didn't you?为什么用didn't you?
you used to be short,didn't you?为什么用didn't you?不用are't you

you used to be short,didn't you?为什么用didn't you?you used to be short,didn't you?为什么用didn't you?不用are't you
前一句是过去常常...要根据前面来回答,前面没有be,所以后用didn't you 或useden't you 都行,但常用的是前者.书上也是.