因为这是过去式啊 lsat sunday 就是很明显的时间状语
还有 came 很明显有的就是过去式 啊
did 用于过去式
do 用于一般现在时
does 用于一般现在时 且是在第三人称单数时使用
we came back last sunday提问时为什么用did
3个回答
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