Do you have to buy this hat?No,i needn't necessary为什么填needn't

Do you have to buy this hat?No,i needn't necessary为什么填needn't
Do you have to buy this hat?No,i needn't necessary为什么填needn't

Do you have to buy this hat?No,i needn't necessary为什么填needn't
needn't 不必=don't have to

need 和necessary是不一样的

你必须买这顶帽子吗？ 不，我不必。没必要
needn't= don't have to
原句应该是No,i needn't. it isn't necessary