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I t is a long time since they have been married.急.这句话是错的,错的哪儿?为什么?

题目详情
I t is a long time since they have been married.
急.这句话是错的,错的哪儿?为什么?
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答案和解析
用于句型“It’s / It has been + 一段时间 + since + 时间状语从句”中,译作“自从…以来,已经…(时间)了”.如 It’s / has been three months since he moved to this city.要求:主句的谓v.用一般现在时或现在完成时;从句的谓v.用一般过去时,而且须是终止性动词.
所以句子应该改为:It has been a long time since they got married.