1.概念:表示動作從某一時間開始一直延續(xù)到將來某一時間。是否繼續(xù)下去,要視上下文而定。
2.基本結構:shall/will have been doing
3.例:
I shall have been working here in this factory for twenty years by the end of the year.
到今年年底,我將在這個工廠工作20年了。
If we don't hurry up the store will have been closing before we get there.
咱們如不快一點兒,等我們到了那兒,店門就會關了。