the report that the missing plane has been found was untrue为什么主句时态是过去时,而从句是现在完成时

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thereportthatthemissingplanehasbeenfoundwasuntrue为什么主句时态是过去时,而从句是现在完成时thereportthatthemissingplaneha

the report that the missing plane has been found was untrue为什么主句时态是过去时,而从句是现在完成时
the report that the missing plane has been found was untrue
为什么主句时态是过去时,而从句是现在完成时

the report that the missing plane has been found was untrue为什么主句时态是过去时,而从句是现在完成时
消失的飞机在报道之前已经发现了.所以用完成时.报道已经发出去了,所以是过去时
其实has been 用 had been更好,因为过去的过去用过去完成时