_you_(do)an experiment yesterday?Yes,we_(do) MAry does some shopping in Saturdau.(last Saturday改写

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_you_(do)an experiment yesterday?Yes,we_(do) MAry does some shopping in Saturdau.(last Saturday改写

_you_(do)an experiment yesterday?Yes,we_(do) MAry does some shopping in Saturdau.(last Saturday改写
_you_(do)an experiment yesterday?Yes,we_(do) MAry does some shopping in Saturdau.(last Saturday改写

_you_(do)an experiment yesterday?Yes,we_(do) MAry does some shopping in Saturdau.(last Saturday改写
Did, do
did
Mary did some shopping last Saturday.

Did you do an experiment yesterday?
Yes,we did.
Mary did some shopping last Saturday.

分别是Did do did did

不好意思,我觉得你的问题表达不是很清楚,不过据我的理解应该是以下:Did you do an experiment yesterday?yes,we did.Mary did some shopping last Saturday!
希望能帮到你。