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