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新概念59课最后一句..rex got so annoyed we have not seen him since

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新概念59课最后一句..rex got so annoyed we have not seen him since
为什么前面是got(过去时)而后面是have(现在完成时)?
新概念59课最后一句..rex got so annoyed we have not seen him since
got angry用一般过去时态.说明那只狗Rex就是在那个时刻生气了.那个时刻于现在相比是过去..
而后面用现在完成时表明到现在为止我们都没有看到他.动作从它生气开始一直延续写到现在.