Mary is making a dress when she cut her finger.错在哪?

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Mary is making a dress when she cut her finger.错在哪?

Mary is making a dress when she cut her finger.错在哪?
Mary is making a dress when she cut her finger.错在哪?

Mary is making a dress when she cut her finger.错在哪?
is 改为was
应该是过去时态哦

第一种,没有把is改成was
第二种,cut没有加s