could acidify
Regular verb: acidify - acidified- acidified

Affirmation 	
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I could acidify
you could acidify
he could acidify
we could acidify
you could acidify
they could acidify 	I could be acidifying
you could be acidifying
he could be acidifying
we could be acidifying
you could be acidifying
they could be acidifying	I could have acidified
you could have acidified
he could have acidified
we could have acidified
you could have acidified
they could have acidified	I could have been acidifying
you could have been acidifying
he could have been acidifying
we could have been acidifying
you could have been acidifying
they could have been acidifying	

Negation 	
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I couldn't acidify
you couldn't acidify
he couldn't acidify
we couldn't acidify
you couldn't acidify
they couldn't acidify 	I couldn't be acidifying
you couldn't be acidifying
he couldn't be acidifying
we couldn't be acidifying
you couldn't be acidifying
they couldn't be acidifying	I couldn't have acidified
you couldn't have acidified
he couldn't have acidified
we couldn't have acidified
you couldn't have acidified
they couldn't have acidified	I couldn't have been acidifying
you couldn't have been acidifying
he couldn't have been acidifying
we couldn't have been acidifying
you couldn't have been acidifying
they couldn't have been acidifying	

Interrogative form 	
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could I acidify?
could you acidify?
could he acidify?
could we acidify?
could you acidify?
could they acidify? 	could I be acidifying?
could you be acidifying?
could he be acidifying?
could we be acidifying?
could you be acidifying?
could they be acidifying? 	could I have acidified?
could you have acidified?
could he have acidified?
could we have acidified?
could you have acidified?
could they have acidified? 	could I have been acidifying?
could you have been acidifying?
could he have been acidifying?
could we have been acidifying?
could you have been acidifying?
could they have been acidifying? 	

Interro-negative form 	
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couldn't I acidify?
couldn't you acidify?
couldn't he acidify?
couldn't we acidify?
couldn't you acidify?
couldn't they acidify? 	couldn't I be acidifying?
couldn't you be acidifying?
couldn't he be acidifying?
couldn't we be acidifying?
couldn't you be acidifying?
couldn't they be acidifying? 	couldn't I have acidified?
couldn't you have acidified?
couldn't he have acidified?
couldn't we have acidified?
couldn't you have acidified?
couldn't they have acidified? 	couldn't I have been acidifying?
couldn't you have been acidifying?
couldn't he have been acidifying?
couldn't we have been acidifying?
couldn't you have been acidifying?
couldn't they have been acidifying?