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August 31, 2015

Homework Help: English

Posted by rfvv on Wednesday, July 9, 2014 at 4:48pm.

1. It has taken many centuries of wars and fightings for mankind to learn this.

2. It took many centuries of wars and fightings for mankind to learn this.

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Why do we have to use 'has taken' as in Sentence 1? What about Sentence 2, where the past tense 'took' is used? What is the difference between #1 and #2?

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