they had a good time last night.so ...i需解析

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they had a good time last night.so ...i需解析

they had a good time last night.so ...i需解析
they had a good time last night.so ...i
需解析

they had a good time last night.so ...i需解析
did ,以do代替前面句子中的动词.又因为前面主句中为一般过去式,所以用did