English verb conjugation
CAN UNDERMINE

Regular verb: undermine - undermined - undermined

Affirmation

Simple form	V-ing form
I can undermine you can undermine she can undermine we can undermine you can undermine they can undermine	I can be undermining you can be undermining she can be undermining we can be undermining you can be undermining they can be undermining
Perfect	V-ing perfect
I can have undermined you can have undermined she can have undermined we can have undermined you can have undermined they can have undermined	I can have been undermining you can have been undermining she can have been undermining we can have been undermining you can have been undermining they can have been undermining

Negation

Simple form	V-ing form
I cannot undermine you cannot undermine she cannot undermine we cannot undermine you cannot undermine they cannot undermine	I cannot be undermining you cannot be undermining she cannot be undermining we cannot be undermining you cannot be undermining they cannot be undermining
Perfect	V-ing perfect
I cannot have undermined you cannot have undermined she cannot have undermined we cannot have undermined you cannot have undermined they cannot have undermined	I cannot have been undermining you cannot have been undermining she cannot have been undermining we cannot have been undermining you cannot have been undermining they cannot have been undermining

Interrogative form

Simple form	V-ing form
can I undermine? can you undermine? can she undermine? can we undermine? can you undermine? can they undermine?	can I be undermining? can you be undermining? can she be undermining? can we be undermining? can you be undermining? can they be undermining?
Perfect	V-ing perfect
can I have undermined? can you have undermined? can she have undermined? can we have undermined? can you have undermined? can they have undermined?	can I have been undermining? can you have been undermining? can she have been undermining? can we have been undermining? can you have been undermining? can they have been undermining?

Interro-negative form

Simple form	V-ing form
can I not undermine? can you not undermine? can she not undermine? can we not undermine? can you not undermine? can they not undermine?	can I not be undermining? can you not be undermining? can she not be undermining? can we not be undermining? can you not be undermining? can they not be undermining?
Perfect	V-ing perfect
can I not have undermined? can you not have undermined? can she not have undermined? can we not have undermined? can you not have undermined? can they not have undermined?	can I not have been undermining? can you not have been undermining? can she not have been undermining? can we not have been undermining? can you not have been undermining? can they not have been undermining?