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Anonymous Posted 11 years ago
Grammar

The

In a sentence, I found the phrase " over the 4.6 billion years". There I want to know the usage of 'the'. Thanks a lot.
  

Top answer

6 billion years since the earth was first formed, land masses have been colliding and splitting. The refers to this particular time period, not some other equally-long time period.

  • 6 billion years since the earth was first formed, land masses have been colliding and splitting.
  • The refers to this particular time period, not some other equally-long time period.
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2 Answers
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Your sentence probably read something like this:

Over the 4.6 billion years since the earth was first formed, land masses have been colliding and splitting.

The refers to this particular time period, not some other equally-long time period.
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"the 4.6 billion years" means a specific interval of 4.6 billion years that the reader already knows about, or that is just about to be defined (e.g. "the 4.6 billion years that have passed since the formation of the Earth").

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