English verb conjugation
CAN SEVER

Regular verb: sever - severed - severed

Affirmation

Simple form	V-ing form
I can sever you can sever she can sever we can sever you can sever they can sever	I can be severing you can be severing she can be severing we can be severing you can be severing they can be severing
Perfect	V-ing perfect
I can have severed you can have severed she can have severed we can have severed you can have severed they can have severed	I can have been severing you can have been severing she can have been severing we can have been severing you can have been severing they can have been severing

Negation

Simple form	V-ing form
I cannot sever you cannot sever she cannot sever we cannot sever you cannot sever they cannot sever	I cannot be severing you cannot be severing she cannot be severing we cannot be severing you cannot be severing they cannot be severing
Perfect	V-ing perfect
I cannot have severed you cannot have severed she cannot have severed we cannot have severed you cannot have severed they cannot have severed	I cannot have been severing you cannot have been severing she cannot have been severing we cannot have been severing you cannot have been severing they cannot have been severing

Interrogative form

Simple form	V-ing form
can I sever? can you sever? can she sever? can we sever? can you sever? can they sever?	can I be severing? can you be severing? can she be severing? can we be severing? can you be severing? can they be severing?
Perfect	V-ing perfect
can I have severed? can you have severed? can she have severed? can we have severed? can you have severed? can they have severed?	can I have been severing? can you have been severing? can she have been severing? can we have been severing? can you have been severing? can they have been severing?

Interro-negative form

Simple form	V-ing form
can I not sever? can you not sever? can she not sever? can we not sever? can you not sever? can they not sever?	can I not be severing? can you not be severing? can she not be severing? can we not be severing? can you not be severing? can they not be severing?
Perfect	V-ing perfect
can I not have severed? can you not have severed? can she not have severed? can we not have severed? can you not have severed? can they not have severed?	can I not have been severing? can you not have been severing? can she not have been severing? can we not have been severing? can you not have been severing? can they not have been severing?