could clarify
Regular verb: clarify - clarified- clarified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could clarify
you could clarify
she could clarify
we could clarify
you could clarify
they could clarify 	I could be clarifying
you could be clarifying
she could be clarifying
we could be clarifying
you could be clarifying
they could be clarifying	I could have clarified
you could have clarified
she could have clarified
we could have clarified
you could have clarified
they could have clarified	I could have been clarifying
you could have been clarifying
she could have been clarifying
we could have been clarifying
you could have been clarifying
they could have been clarifying	

Negation 	
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I couldn't clarify
you couldn't clarify
she couldn't clarify
we couldn't clarify
you couldn't clarify
they couldn't clarify 	I couldn't be clarifying
you couldn't be clarifying
she couldn't be clarifying
we couldn't be clarifying
you couldn't be clarifying
they couldn't be clarifying	I couldn't have clarified
you couldn't have clarified
she couldn't have clarified
we couldn't have clarified
you couldn't have clarified
they couldn't have clarified	I couldn't have been clarifying
you couldn't have been clarifying
she couldn't have been clarifying
we couldn't have been clarifying
you couldn't have been clarifying
they couldn't have been clarifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I clarify?
could you clarify?
could she clarify?
could we clarify?
could you clarify?
could they clarify? 	could I be clarifying?
could you be clarifying?
could she be clarifying?
could we be clarifying?
could you be clarifying?
could they be clarifying? 	could I have clarified?
could you have clarified?
could she have clarified?
could we have clarified?
could you have clarified?
could they have clarified? 	could I have been clarifying?
could you have been clarifying?
could she have been clarifying?
could we have been clarifying?
could you have been clarifying?
could they have been clarifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I clarify?
couldn't you clarify?
couldn't she clarify?
couldn't we clarify?
couldn't you clarify?
couldn't they clarify? 	couldn't I be clarifying?
couldn't you be clarifying?
couldn't she be clarifying?
couldn't we be clarifying?
couldn't you be clarifying?
couldn't they be clarifying? 	couldn't I have clarified?
couldn't you have clarified?
couldn't she have clarified?
couldn't we have clarified?
couldn't you have clarified?
couldn't they have clarified? 	couldn't I have been clarifying?
couldn't you have been clarifying?
couldn't she have been clarifying?
couldn't we have been clarifying?
couldn't you have been clarifying?
couldn't they have been clarifying?