could revamp
Regular verb: revamp - revamped- revamped

Affirmation 	
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I could revamp
you could revamp
he could revamp
we could revamp
you could revamp
they could revamp 	I could be revamping
you could be revamping
he could be revamping
we could be revamping
you could be revamping
they could be revamping	I could have revamped
you could have revamped
he could have revamped
we could have revamped
you could have revamped
they could have revamped	I could have been revamping
you could have been revamping
he could have been revamping
we could have been revamping
you could have been revamping
they could have been revamping	

Negation 	
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I couldn't revamp
you couldn't revamp
he couldn't revamp
we couldn't revamp
you couldn't revamp
they couldn't revamp 	I couldn't be revamping
you couldn't be revamping
he couldn't be revamping
we couldn't be revamping
you couldn't be revamping
they couldn't be revamping	I couldn't have revamped
you couldn't have revamped
he couldn't have revamped
we couldn't have revamped
you couldn't have revamped
they couldn't have revamped	I couldn't have been revamping
you couldn't have been revamping
he couldn't have been revamping
we couldn't have been revamping
you couldn't have been revamping
they couldn't have been revamping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I revamp?
could you revamp?
could he revamp?
could we revamp?
could you revamp?
could they revamp? 	could I be revamping?
could you be revamping?
could he be revamping?
could we be revamping?
could you be revamping?
could they be revamping? 	could I have revamped?
could you have revamped?
could he have revamped?
could we have revamped?
could you have revamped?
could they have revamped? 	could I have been revamping?
could you have been revamping?
could he have been revamping?
could we have been revamping?
could you have been revamping?
could they have been revamping? 	

Interro-negative form 	
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couldn't I revamp?
couldn't you revamp?
couldn't he revamp?
couldn't we revamp?
couldn't you revamp?
couldn't they revamp? 	couldn't I be revamping?
couldn't you be revamping?
couldn't he be revamping?
couldn't we be revamping?
couldn't you be revamping?
couldn't they be revamping? 	couldn't I have revamped?
couldn't you have revamped?
couldn't he have revamped?
couldn't we have revamped?
couldn't you have revamped?
couldn't they have revamped? 	couldn't I have been revamping?
couldn't you have been revamping?
couldn't he have been revamping?
couldn't we have been revamping?
couldn't you have been revamping?
couldn't they have been revamping?