could underinsure
Regular verb: underinsure - underinsured- underinsured

Affirmation 	
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I could underinsure
you could underinsure
he could underinsure
we could underinsure
you could underinsure
they could underinsure 	I could be underinsuring
you could be underinsuring
he could be underinsuring
we could be underinsuring
you could be underinsuring
they could be underinsuring	I could have underinsured
you could have underinsured
he could have underinsured
we could have underinsured
you could have underinsured
they could have underinsured	I could have been underinsuring
you could have been underinsuring
he could have been underinsuring
we could have been underinsuring
you could have been underinsuring
they could have been underinsuring	

Negation 	
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I could not underinsure
you could not underinsure
he could not underinsure
we could not underinsure
you could not underinsure
they could not underinsure 	I could not be underinsuring
you could not be underinsuring
he could not be underinsuring
we could not be underinsuring
you could not be underinsuring
they could not be underinsuring	I could not have underinsured
you could not have underinsured
he could not have underinsured
we could not have underinsured
you could not have underinsured
they could not have underinsured	I could not have been underinsuring
you could not have been underinsuring
he could not have been underinsuring
we could not have been underinsuring
you could not have been underinsuring
they could not have been underinsuring	

Interrogative form 	
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could I underinsure?
could you underinsure?
could he underinsure?
could we underinsure?
could you underinsure?
could they underinsure? 	could I be underinsuring?
could you be underinsuring?
could he be underinsuring?
could we be underinsuring?
could you be underinsuring?
could they be underinsuring? 	could I have underinsured?
could you have underinsured?
could he have underinsured?
could we have underinsured?
could you have underinsured?
could they have underinsured? 	could I have been underinsuring?
could you have been underinsuring?
could he have been underinsuring?
could we have been underinsuring?
could you have been underinsuring?
could they have been underinsuring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not underinsure?
could you not underinsure?
could he not underinsure?
could we not underinsure?
could you not underinsure?
could they not underinsure? 	could I not be underinsuring?
could you not be underinsuring?
could he not be underinsuring?
could we not be underinsuring?
could you not be underinsuring?
could they not be underinsuring? 	could I not have underinsured?
could you not have underinsured?
could he not have underinsured?
could we not have underinsured?
could you not have underinsured?
could they not have underinsured? 	could I not have been underinsuring?
could you not have been underinsuring?
could he not have been underinsuring?
could we not have been underinsuring?
could you not have been underinsuring?
could they not have been underinsuring?