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    • Join Date: Oct 2004
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    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?


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    • Join Date: Oct 2008
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    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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