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Hello everyone,

this is my first post in this forum and I hope someone can help me.
I am not a native English speaker so I hope you will forgive me all the mistakes I certainly will do... Emotion: wink

Well, actually my question...
In my English Grammar book I used to use at school, it was said that there is a "Will-Future-Progressive-Tense" in existance in English, formed like

will have been + present participle

The only information given to this was that it is rarely used.
I'd like to know when this tense is going to be used (context), can anyone of you explain that to me please or give an example?

Thank you very much!
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Will-Future "Perfect" Progressive Tense

of course, sorry Emotion: wink
Used almost exactly like "have been + present participle," except that it's in the future.
Example: "By the time you get to work tomorrow, I will have been slaving away for hours."
So basically, a future state resulting from an action occurring sometime before it.
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imagine two events taking place... one starting sometime in the FUTURE and continuing on and on, when the second one interrupts it (or at least takes place during the first event). the first event will use the future perfect (often followed by a "quantity" of time); the second in the present (often preceded by the expression "by the time")

example:

event 1) driving a car
event 2) crossing a border

i will have been driving a car for 4 hours by the time i cross the border.

of course, the two parts of the sentence can be reversed, but the tenses must remain with the correct action:

by the time i cross the border i will have been driving for 4 hours.

(and yes, it is used rarely... aren't you lucky?)
I thought about this use, thank you for your example, it helped me a lot Emotion: wink

But one more question:
If the continuing action takes place in the future, the "interrupting" action has to take place in the future as well -
So doesn't your example actually have to be either:

"I will have been driving a car for 4 hours by the time I will cross the border."
(An event that will happen some time after around 4 hours) or:
"I will have been driving a car for 4 hours by the time I will be crossing the border."
(Exactly after 4 hours I will be in progress crossing the border) or:
"I will have been driving a car for 4 hours by the time I will have crossed the border."
(After I have crossed the border, I will have been driving for >at least
Would these sentences (always depending on the situation) be correct?
I'd say, it should be at least a future-form, too in the other sentence because both actions take place in the future... or am I wrong now?
Would be interesting to know, thank you kindly. Emotion: wink

>>Lucky because it is rarely used? Well, even if it was it wouldn't be a big problem I think.
One tense more or less out of 13 Emotion: wink
Rare?
I beg to differ. In my opinion this tense is very common, and by the end of the day, I daresay, it will have been of great use to a great many people.
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dear pemmican... sounds like you have studied french (or another romance language)! logically, you are correct that BOTH events are future, but english grammar assumes that the future perfect will logically and contextually place the other event also in the future. (other languages require a future tense for both events.) therefore, your examples are incorrect, a hyper-correction. i understand where you are coming from however.
Dear Moijelesuis,
I'm sorry to disappoint you, but I haven't studied a Romance language (I took French at school for a few years, but I've forgotten nearly everything by now).
My question was just because it would have been logical if the 2nd part of those sentences were a future tense, too.
But as you've mentioned: It's also logical to assume the other tense will refer to a future event as well and therefore it doesn't have to be announced in a special way.

Thank you, another thing that I'll have to keep in mind! Emotion: smile
Provided that you continue to study in this way,in three years' time you___________English.

a) will have mastered
b) will have been mastering

What about the abover question?
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