By next month he will have been working in out factory for 30 years.
到下个月他在我们工厂工作30年了。
By the end of the month he will have been living/working/studying here for ten years.
到了月底他在这里居住/工作/学习就满十年了。
By the end of the month he will have been living/working/studying here for ten years.
到了月底他在这里居住/工作/学习就满十年了。
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