一、将来完成进行时的结构
主语+ shall/will + have + been + 现在分词 + 其他成分
如:
1.I shall have been working here in this factory for twenty years by the end of the year.
到今 年年底，我将在这个工厂工作20年了 2.The play is coming off in August. By then the play will have been running for three months.
这个剧将于8月停演。到那时为止，这个剧将连演三个月了。 3.By Friday midday, they will have been working on it for seven days.
到星期五中午，他们就在这个工程上干了7天了。
二、将来完成进行时的用法
在下列句子中，will是情态助动词，有“大概”或“我想”的含义。
如：
1.You’ll have been wondering all this time how my invention works. 我想你这些时候一直想知道我的发明是怎样工作的吧。
2.They will have been having a holiday yesterday. 他们昨天大概是在度假来着。
3.By the time John retires, James will have been practicing for 10 years. 到约翰退休的时候，詹姆斯已经在从事工作10年了。
4.If we don't hurry up the store will have been closing before we get there. 咱们如不快一点儿，等我们到了那儿，店门就会关了。
本文来自：逍遥右脑记忆 http://www.jiyifa.net/gaozhong/839877.html
相关阅读：2017年福建高考英语试卷结构