could apperceive
Regular verb: apperceive - apperceived- apperceived

Affirmation 	
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I could apperceive
you could apperceive
she could apperceive
we could apperceive
you could apperceive
they could apperceive 	I could be apperceiving
you could be apperceiving
she could be apperceiving
we could be apperceiving
you could be apperceiving
they could be apperceiving	I could have apperceived
you could have apperceived
she could have apperceived
we could have apperceived
you could have apperceived
they could have apperceived	I could have been apperceiving
you could have been apperceiving
she could have been apperceiving
we could have been apperceiving
you could have been apperceiving
they could have been apperceiving	

Negation 	
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I couldn't apperceive
you couldn't apperceive
she couldn't apperceive
we couldn't apperceive
you couldn't apperceive
they couldn't apperceive 	I couldn't be apperceiving
you couldn't be apperceiving
she couldn't be apperceiving
we couldn't be apperceiving
you couldn't be apperceiving
they couldn't be apperceiving	I couldn't have apperceived
you couldn't have apperceived
she couldn't have apperceived
we couldn't have apperceived
you couldn't have apperceived
they couldn't have apperceived	I couldn't have been apperceiving
you couldn't have been apperceiving
she couldn't have been apperceiving
we couldn't have been apperceiving
you couldn't have been apperceiving
they couldn't have been apperceiving	

Interrogative form 	
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could I apperceive?
could you apperceive?
could she apperceive?
could we apperceive?
could you apperceive?
could they apperceive? 	could I be apperceiving?
could you be apperceiving?
could she be apperceiving?
could we be apperceiving?
could you be apperceiving?
could they be apperceiving? 	could I have apperceived?
could you have apperceived?
could she have apperceived?
could we have apperceived?
could you have apperceived?
could they have apperceived? 	could I have been apperceiving?
could you have been apperceiving?
could she have been apperceiving?
could we have been apperceiving?
could you have been apperceiving?
could they have been apperceiving? 	

Interro-negative form 	
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couldn't I apperceive?
couldn't you apperceive?
couldn't she apperceive?
couldn't we apperceive?
couldn't you apperceive?
couldn't they apperceive? 	couldn't I be apperceiving?
couldn't you be apperceiving?
couldn't she be apperceiving?
couldn't we be apperceiving?
couldn't you be apperceiving?
couldn't they be apperceiving? 	couldn't I have apperceived?
couldn't you have apperceived?
couldn't she have apperceived?
couldn't we have apperceived?
couldn't you have apperceived?
couldn't they have apperceived? 	couldn't I have been apperceiving?
couldn't you have been apperceiving?
couldn't she have been apperceiving?
couldn't we have been apperceiving?
couldn't you have been apperceiving?
couldn't they have been apperceiving?