English verb conjugation
CAN CUBE

Regular verb: cube - cubed - cubed

Affirmation

Simple form	V-ing form
I can cube you can cube she can cube we can cube you can cube they can cube	I can be cubing you can be cubing she can be cubing we can be cubing you can be cubing they can be cubing
Perfect	V-ing perfect
I can have cubed you can have cubed she can have cubed we can have cubed you can have cubed they can have cubed	I can have been cubing you can have been cubing she can have been cubing we can have been cubing you can have been cubing they can have been cubing

Negation

Simple form	V-ing form
I cannot cube you cannot cube she cannot cube we cannot cube you cannot cube they cannot cube	I cannot be cubing you cannot be cubing she cannot be cubing we cannot be cubing you cannot be cubing they cannot be cubing
Perfect	V-ing perfect
I cannot have cubed you cannot have cubed she cannot have cubed we cannot have cubed you cannot have cubed they cannot have cubed	I cannot have been cubing you cannot have been cubing she cannot have been cubing we cannot have been cubing you cannot have been cubing they cannot have been cubing

Interrogative form

Simple form	V-ing form
can I cube? can you cube? can she cube? can we cube? can you cube? can they cube?	can I be cubing? can you be cubing? can she be cubing? can we be cubing? can you be cubing? can they be cubing?
Perfect	V-ing perfect
can I have cubed? can you have cubed? can she have cubed? can we have cubed? can you have cubed? can they have cubed?	can I have been cubing? can you have been cubing? can she have been cubing? can we have been cubing? can you have been cubing? can they have been cubing?

Interro-negative form

Simple form	V-ing form
can I not cube? can you not cube? can she not cube? can we not cube? can you not cube? can they not cube?	can I not be cubing? can you not be cubing? can she not be cubing? can we not be cubing? can you not be cubing? can they not be cubing?
Perfect	V-ing perfect
can I not have cubed? can you not have cubed? can she not have cubed? can we not have cubed? can you not have cubed? can they not have cubed?	can I not have been cubing? can you not have been cubing? can she not have been cubing? can we not have been cubing? can you not have been cubing? can they not have been cubing?