通过练习未来完成时态，可以帮助学习者更好地把握时间的概念，以及如何描述将来某个时刻之前所完成的动作。该练习旨在增强学习者对未来完成时态的理解和使用，同时也可以提高学生对复杂句子结构的把握能力。下面我们将通过填空练习来练习未来完成时态的构成和用法。
By the time she arrives, we *will have eaten* (已经) dinner.
By next week, he *will have worked* (工作) at the company for three years.
I’m sure by 10 o’clock they *will have left* (离开) the house.
They *will have finished* (完成) the project by the end of this month.
Before the summer ends, we *will have driven* (驾驶) across the entire country.
You *will have received* (收到) the package by then, won’t you?
By the time you wake up, I *will have gone* (去) to the gym.
She *will have learned* (学会) Spanish before her trip to Spain.
I’m afraid they *will have sold* (卖出) all the tickets by the time we get there.
By 2025, scientists *will have discovered* (发现) new ways to treat the disease.
In two days’ time, the caterpillar *will have turned* (变成) into a butterfly.
I *will have saved* (节省) enough money to buy a new car by the end of the year.
He *will have completed* (完成) marathon training by this time next week.
They *will have been* (是) married for twenty years next month.
By tomorrow, all the snow *will have melted* (融化).
练习二：填空题 – 未来完成时态
We *will have arrived* (到达) at our destination by sunset.
By the age of 30, she *will have completed* (完成) her PhD.
They *will have painted* (油漆) the entire house by the time we return.
The play *will have started* (开始) by the time we reach the theatre.
He *will have made* (做) a decision by tomorrow morning.
By the end of the week, you *will have forgotten* (忘记) all about this.
She *will have taken* (拿) her medicine by the time you remind her.
My parents *will have been* (是) on vacation for two weeks by this Friday.
You *will have to* (必须) finish your homework by 9 PM.
The gardener *will have trimmed* (修剪) all the bushes by noon.
By the time the concert starts, the band *will have practiced* (练习) for hours.
I *will have read* (读) through all the reports by our next meeting.
They *will have built* (建造) the bridge by the end of next year.
The baby *will have grown* (长大) so much by the time you see him again.
By Monday, the negotiations *will have concluded* (结束).
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