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As far as I know these are tenses that you do not often use. Am I right?

Will have been + verb+ing

Would have been + verb+ing

Mari-Lou A
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nima
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1 Answers1

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You are right that the two constructions are not often used. This is because they express uncommon ideas. Both are grammatical, however, and could be used as follows:

By the time I retire I will have been working here for 45 years.

If you had called me 10 minutes ago, I would have been sleeping.

Shoe
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    +1 "This is because they express uncommon ideas." It's not that these tenses are avoided, it's simply that they are not often needed. – zombiebeethoven Jan 23 '14 at 20:55
  • It's just that these aren't tenses. They're just a couple of the many thousands of possible English auxiliary verb constructions, most of which are used infrequently because there are so many of them. – John Lawler Jan 23 '14 at 21:06
  • @JohnLawler So do linguisticians not consider the future-perfect a tense? – WS2 Jan 23 '14 at 21:38
  • No more than they consider the Past Usitative Necessitive a tense. What you call "future-perfect" is a combination of the modal auxiliary will with a perfect construction. One can do the same with the other modal auxiliaries may, might, must, can, could, shall, should, and would. And one can do the same with all kinds of other constructions, like the "Past Usitative Necessitive Tense" of go, I used to have to go. – John Lawler Jan 23 '14 at 23:48
  • Oh, and it's linguist, by the way. As you are surely aware, nobody ever uses linguistician. – John Lawler Jan 23 '14 at 23:49
  • I do see how this can answer the OP's question. Please also see my meta comment at the OP. – Kris Jan 24 '14 at 08:11