Did your bought some postcard last night 有错误吗
问题描述：
Did your bought some postcard last night 有错误吗
答
Did your buy some postcards last night ?
答
Did you buy some post cards last night?
答
your应该改为you,bought改为buy
Did you buy some post cards last night?
答
bought--buy
Did在前动词不用过去式
答
Did your buy
要用动词原形