到下个月底，这个项目就已经开展了整整三个月。
By the end of next month, this project will have been running for three full months.
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Will英 /wɪl/|美 /wɪl/
been英 /biːn/|美 /bɪn/
running英 /ˈrʌnɪŋ/|美 /ˈrʌnɪŋ/
解释
将来完成进行时由 will have been + 现在分词 running 构成，以下个月底为参照点，表达项目从启动到参照点已持续了三个月。
By the end of next month, this project will have been running for three full months.
将来完成进行时由 will have been + 现在分词 running 构成，以下个月底为参照点，表达项目从启动到参照点已持续了三个月。