He ate two burgers a moment ago.He didn't eat two burgers a moment ago.Did he eat two burgers a moment ago?She danced and sang the day day before yesterday.She didn't dance or sing the day day before ...She danced and sang the day day before yesterday.这句和下面两句怎么有两个day？应该是打错吧，正确的是She danced and sang the day before yesterday.She didn'tdance or sing the daybefore yesterday.（ 注：否定句中的并列用OR)Did she danced and sing the day before yesterday?（注：he day before yesterday 是固定词组‘前天’， 不应该有两个day）