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    • Join Date: Oct 2004
    • Posts: 107


    Hi, everyone...

    During the class, I have found a little strange sentence.

    "By 1985, the amount of energy needed to produce a ton of grain had more than doubled."
    I have never seen the sentences that some words are put between 'had' and 'participle' such as 'more than' in the above sentence.

    Is it right grammatically?


    • Member Info
      • Native Language:
      • English
      • Home Country:
      • United States
      • Current Location:
      • Canada

    • Join Date: Oct 2008
    • Posts: 1,211

    Re: tense...

    Yes it is correct.
    Starting from the basics it looks like this:

    (By 1985) the amount had doubled.

    Everything else is filler. It increased by more than two times so it more than doubled.

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