We have had a summer vacation for more than three months.我们已经过了三个多月的暑假。句子用了 [现在完成时] , 表达一种动作在说话的当时已经完成或者仍是真的.have had : 格式1. 在名词 [noun] 之后加 have 或 has。例如: I, We, You, They / have, He, She, It / has.2. 把动词 [verb] 的形式转为 [分词] (perfect) 式。例如: go => gone sing =>sung drink => drunk do => done has, have => had
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