Conjugaison du verbe anglais COULD AMPLIFY

I could amplify
you could amplify
he could amplify
we could amplify
you could amplify
they could amplify

I could be amplifying
you could be amplifying
he could be amplifying
we could be amplifying
you could be amplifying
they could be amplifying

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you could have amplified
he could have amplified
we could have amplified
you could have amplified
they could have amplified

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you could have been amplifying
he could have been amplifying
we could have been amplifying
you could have been amplifying
they could have been amplifying

I could not amplify
you could not amplify
he could not amplify
we could not amplify
you could not amplify
they could not amplify

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you could not be amplifying
he could not be amplifying
we could not be amplifying
you could not be amplifying
they could not be amplifying

I could not have amplified
you could not have amplified
he could not have amplified
we could not have amplified
you could not have amplified
they could not have amplified

I could not have been amplifying
you could not have been amplifying
he could not have been amplifying
we could not have been amplifying
you could not have been amplifying
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could they not have amplified?

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could you not have been amplifying?
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could they not have been amplifying?