VOA一分钟英语：将来完成进行时 用法是什么？

“到这期视频的第二幕时，主持人 Tom 将已连着吃了五分钟的面条。” 如果想用英语来描述前面这句话，应使用表示动作持续到将来某个时间点的将来完成进行时（future perfect continuous tense）。你知道这句话的正确英语说法吗？怎样把这个时态中的肯定句变成否定句？
 
Hi! I’m Tom, and today I’m going to show you how to use the future perfect continuous.
When we use the future perfect continuous, we imagine ourselves at a point in the future. And, we then talk about a continuing action which leads to this point.
Let’s practise.
At the start of the next scene, I will have been eating noodles for five minutes.
See? It’s nearly finished.
We make this tense using subject, will have been, plus verb-ING.
For example: At lunchtime, I will have been working for four hours.
And we can also use ‘won’t’ to make the tense negative.
 
用法总结
1 将来完成进行时的用法：想像未来的某个时间点，并谈论一直到该时间点仍在持续进行的动作。 
At the start of the next scene, I will have been eating noodles for five minutes.
By this Thursday, he will have been waiting for this parcel for 20 days.
 
2 将来完成进行时的基本结构：主语 + will have been + 动词-ing。可以把其中的 “will” 改为 “won’t” 来组成将来完成进行时的否定句。 
At lunchtime, I will have been working for four hours.
My colleagues are getting a pay rise next week, but I won’t have been working here for long enough to receive it.