其实这两种形式都可以的 在牛津词典上都可以查到例句
It's a long time since还是It has been a long time since
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相关问题
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It has been a long time since ...句型
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关于since It has been a long time since I was happy last time.
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it has been a long time since+?since后面加什么形式?
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It's a long time since we ______(Meet)last time,isn't it?
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it's a long time since we met last
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英语翻译It has been a long time since I first heard of this movi
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改错：It`s a long time since we have met last time.
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---It’s a long time since I saw my sister.
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it's a long time since i last saw you
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i think it's been a long time since i've heard anyone is goo