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求教:Igotoschoolonweekdays,butnotonSaturdayandSunday.Igotoschoolonweekdays,butnotonSaturdayandSunday.请问上句中后半截是否定,为什么用“and”而不用“or”呢?

题目详情
求教:I go to school on weekdays,but not on Saturday and Sunday.
I go to school on weekdays,but not on Saturday and Sunday.
请问上句中后半截是否定,为什么用“and ”而不用“or”呢?
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答案和解析
"And"用于肯定句,其转换为否定形式为"Or",就像"Too"一样,都是规定了的.