could vivify
Regular verb: vivify - vivified- vivified

Affirmation 	
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I could vivify
you could vivify
she could vivify
we could vivify
you could vivify
they could vivify 	I could be vivifying
you could be vivifying
she could be vivifying
we could be vivifying
you could be vivifying
they could be vivifying	I could have vivified
you could have vivified
she could have vivified
we could have vivified
you could have vivified
they could have vivified	I could have been vivifying
you could have been vivifying
she could have been vivifying
we could have been vivifying
you could have been vivifying
they could have been vivifying	

Negation 	
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I couldn't vivify
you couldn't vivify
she couldn't vivify
we couldn't vivify
you couldn't vivify
they couldn't vivify 	I couldn't be vivifying
you couldn't be vivifying
she couldn't be vivifying
we couldn't be vivifying
you couldn't be vivifying
they couldn't be vivifying	I couldn't have vivified
you couldn't have vivified
she couldn't have vivified
we couldn't have vivified
you couldn't have vivified
they couldn't have vivified	I couldn't have been vivifying
you couldn't have been vivifying
she couldn't have been vivifying
we couldn't have been vivifying
you couldn't have been vivifying
they couldn't have been vivifying	

Interrogative form 	
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could I vivify?
could you vivify?
could she vivify?
could we vivify?
could you vivify?
could they vivify? 	could I be vivifying?
could you be vivifying?
could she be vivifying?
could we be vivifying?
could you be vivifying?
could they be vivifying? 	could I have vivified?
could you have vivified?
could she have vivified?
could we have vivified?
could you have vivified?
could they have vivified? 	could I have been vivifying?
could you have been vivifying?
could she have been vivifying?
could we have been vivifying?
could you have been vivifying?
could they have been vivifying? 	

Interro-negative form 	
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couldn't I vivify?
couldn't you vivify?
couldn't she vivify?
couldn't we vivify?
couldn't you vivify?
couldn't they vivify? 	couldn't I be vivifying?
couldn't you be vivifying?
couldn't she be vivifying?
couldn't we be vivifying?
couldn't you be vivifying?
couldn't they be vivifying? 	couldn't I have vivified?
couldn't you have vivified?
couldn't she have vivified?
couldn't we have vivified?
couldn't you have vivified?
couldn't they have vivified? 	couldn't I have been vivifying?
couldn't you have been vivifying?
couldn't she have been vivifying?
couldn't we have been vivifying?
couldn't you have been vivifying?
couldn't they have been vivifying?