Those who failed to get in need not have felt disappointed as many of the artists who should have appeared did not come. (新概念英语2)
请问老师们这里的not have…是什么用法? 与haven't有区别吗?
你断句错误。need not have felt = needn't have felt。need 在此是情态动词,have felt是不带to的不定式完成体。not 要放在操作词之后。情态动词为操作词,所以not 要置于need 后。
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