Results 1 to 2 of 2
  1. Senior Member
    Student or Learner
    • Member Info
      • Native Language:
      • Chinese
      • Home Country:
      • China
      • Current Location:
      • China

    • Join Date: Nov 2009
    • Posts: 1,049

    Should "could have formed" be "could have been formed"?


    3. The same remarkable circumstance applies to the formation of heavier elements. If the strong nuclear force that holds together protons and neutrons had been even slightly weaker, then only hydrogen could have formed in the universe. If, on the other hand, the strong nuclear force had been slightly stronger, all the hydrogen would have been converted to helium, instead of the 25 percent that occurred early in the Big Bang, and thus the fusion furnaces of stars and their ability to generate heavier elements would never have been born.

  2. Editor,
    English Teacher
    • Member Info
      • Native Language:
      • British English
      • Home Country:
      • UK
      • Current Location:
      • Japan

    • Join Date: Nov 2002
    • Posts: 71,676

    Re: Should "could have formed" be "could have been formed"?

    The active form is correct, but you could also use the passive.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts