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believed to extinct vs believed to become extinct

Both phrases are correct, but they are used in slightly different contexts. 'Believed to be extinct' is commonly used to refer to a current state of extinction, while 'believed to become extinct' implies a future possibility of extinction.

Last updated: March 26, 2024 • 462 views

believed to extinct

This phrase is incorrect. 'Extinct' should be followed by 'be' to form a grammatically correct sentence.

The correct phrase is 'believed to be extinct,' which is used to describe something that is thought to be no longer in existence.
  • Beings who have more than 65 million years and believed to be extinct.
  • Agostina camped for 17 months without human contact in the Bar-She cave near Lake Te-Anin on South Island, New Zealand, where a colony of notorni, a ratite long believed to be extinct, had unexpectedly turned up in 1948.
  • I thought to extinct a bombmaker would be a good thing.
  • The elixir believed to grant everlasting life.
  • Believed to be in the Afghanistan/Pakistan border area.
  • Other information: believed to be in Afghanistan/Pakistan border area.
  • Believed to be in Afghanistan/Pakistan border area.
  • Convicted serial killer Joe Carroll's son is believed to have been abducted...
  • Of those who were believed to be worthy to face the darkness.
  • Currently believed to be in the possession of one Mortimer Fassbinder.
  • Everyone you believed to love you.
  • Multiple witnesses report seeing what they believed to be a kidnapping in Lakeside Park.
  • You have always done what you believed to be right.
  • Then a man believed to be Mangosta resurfaced.
  • He's believed to be one of the missing prisoners.
  • He received an order he believed to be authentic.
  • Nicholas Eastman and Haley Peterson are believed to be traveling on foot and should not be approached.
  • Suspect still believed to be at premises.
  • Joe Carroll and his followers are believed to be inside along with hostages.
  • I'd abandoned everything I believed to please a worthless man.

Alternatives:

  • believed to be extinct

believed to become extinct

This phrase is correct and implies a future possibility of extinction.

'Believed to become extinct' is used to indicate the belief that something will go extinct in the future.
  • I just don't wish to become extinct.
  • If that were true, we would cease fighting all battles and simply allow ourselves to become extinct.
  • Your entire bloodlines, Rumancek, Godfrey, are about to become extinct.
  • Where cod alone is concerned, stocks are down to a third of the minimum volume recommended by scientific experts if this species is not to become extinct.
  • Look, if you're the size of three school busses and you can't save yourself, you deserve to become extinct.
  • We have no significant predators, we're the masters of our physical environment; the things that normally cause species to become extinct are no longer any threat to us.
  • Why would anyone buy into a currency that's about to become extinct?
  • Actually, in the Victorian era, chaps used to go off, when something was about to become extinct, they would go off, find it and shoot it as a trophy.
  • Why would anyone buy into a currency that's about to become extinct?
  • And that if we don't do that, the antithesis, although we've heard otherwise, is we're really going to become extinct, because we're feeding our children to death.
  • Every living thing, sooner or later, becomes extinct.
  • Every living thing, sooner or later, becomes extinct.
  • And to think that in 30, 40 years they could become extinct.
  • Therefore laws themselves could eventually become extinct.
  • As Mr Borg said, three species become extinct on our planet every hour.
  • Species may become extinct before scientists even have a chance to identify them.
  • If pregnancies lasted more than nine months, the human race would have become extinct.
  • It's very difficult to say what would have happened if the large dinosaurs of the Mesozoic era didn't become extinct.
  • Projections are that we could lose polar bears; they could become extinct in the next 50 to 100 years.
  • In Africa, in the year 2000, at least one species of Red Colobus monkey might have become extinct due to hunting.

Alternatives:

  • expected to become extinct
  • predicted to become extinct
  • likely to become extinct
  • thought to become extinct
  • projected to become extinct

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