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 can't cube you can't cube she can't cube we can't cube you can't cube they can't cube	I can't be cubing you can't be cubing she can't be cubing we can't be cubing you can't be cubing they can't be cubing
Perfect	V-ing perfect
I can't have cubed you can't have cubed she can't have cubed we can't have cubed you can't have cubed they can't have cubed	I can't have been cubing you can't have been cubing she can't have been cubing we can't have been cubing you can't have been cubing they can't 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't I cube? can't you cube? can't she cube? can't we cube? can't you cube? can't they cube?	can't I be cubing? can't you be cubing? can't she be cubing? can't we be cubing? can't you be cubing? can't they be cubing?
Perfect	V-ing perfect
can't I have cubed? can't you have cubed? can't she have cubed? can't we have cubed? can't you have cubed? can't they have cubed?	can't I have been cubing? can't you have been cubing? can't she have been cubing? can't we have been cubing? can't you have been cubing? can't they have been cubing?