I thought about this use, thank you for your example, it helped me a lot
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.
>>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