could usurp
Regular verb: usurp - usurped- usurped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could usurp
you could usurp
she could usurp
we could usurp
you could usurp
they could usurp 	I could be usurping
you could be usurping
she could be usurping
we could be usurping
you could be usurping
they could be usurping	I could have usurped
you could have usurped
she could have usurped
we could have usurped
you could have usurped
they could have usurped	I could have been usurping
you could have been usurping
she could have been usurping
we could have been usurping
you could have been usurping
they could have been usurping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not usurp
you could not usurp
she could not usurp
we could not usurp
you could not usurp
they could not usurp 	I could not be usurping
you could not be usurping
she could not be usurping
we could not be usurping
you could not be usurping
they could not be usurping	I could not have usurped
you could not have usurped
she could not have usurped
we could not have usurped
you could not have usurped
they could not have usurped	I could not have been usurping
you could not have been usurping
she could not have been usurping
we could not have been usurping
you could not have been usurping
they could not have been usurping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I usurp?
could you usurp?
could she usurp?
could we usurp?
could you usurp?
could they usurp? 	could I be usurping?
could you be usurping?
could she be usurping?
could we be usurping?
could you be usurping?
could they be usurping? 	could I have usurped?
could you have usurped?
could she have usurped?
could we have usurped?
could you have usurped?
could they have usurped? 	could I have been usurping?
could you have been usurping?
could she have been usurping?
could we have been usurping?
could you have been usurping?
could they have been usurping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not usurp?
could you not usurp?
could she not usurp?
could we not usurp?
could you not usurp?
could they not usurp? 	could I not be usurping?
could you not be usurping?
could she not be usurping?
could we not be usurping?
could you not be usurping?
could they not be usurping? 	could I not have usurped?
could you not have usurped?
could she not have usurped?
could we not have usurped?
could you not have usurped?
could they not have usurped? 	could I not have been usurping?
could you not have been usurping?
could she not have been usurping?
could we not have been usurping?
could you not have been usurping?
could they not have been usurping?