Present perfect vs past simple

English grammar questions, answered by Alan

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JanGlazer
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Present perfect vs past simple

Post by JanGlazer »

Hello everyone! {-:

I'm practicing my writing skills and I am confused with tenses using.

Which of the following options are correct ?

1st option:

"The period during which people have become able to tame wild species, definitely affected our civilization."

2nd option:

"The period during which people became able to tame wild species, definitely affected our civilization."


3rd option:

"The period during which people have become able to tame wild species, definitely has affected our civilization"

4th option:

"The period during which people became able to tame wild species, definitely has affected our civilization"

Thank you.
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Alan
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Re: Present perfect vs past simple

Post by Alan »

None!

--> The period during which people became able to tame wild species definitely affected our civilization.
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