English verb conjugation
CAN SLUB

Regular verb: slub - slubed - slubed

Affirmation

Simple form	V-ing form
I can slub you can slub he can slub we can slub you can slub they can slub	I can be slubing you can be slubing he can be slubing we can be slubing you can be slubing they can be slubing
Perfect	V-ing perfect
I can have slubed you can have slubed he can have slubed we can have slubed you can have slubed they can have slubed	I can have been slubing you can have been slubing he can have been slubing we can have been slubing you can have been slubing they can have been slubing

Negation

Simple form	V-ing form
I can't slub you can't slub he can't slub we can't slub you can't slub they can't slub	I can't be slubing you can't be slubing he can't be slubing we can't be slubing you can't be slubing they can't be slubing
Perfect	V-ing perfect
I can't have slubed you can't have slubed he can't have slubed we can't have slubed you can't have slubed they can't have slubed	I can't have been slubing you can't have been slubing he can't have been slubing we can't have been slubing you can't have been slubing they can't have been slubing

Interrogative form

Simple form	V-ing form
can I slub? can you slub? can he slub? can we slub? can you slub? can they slub?	can I be slubing? can you be slubing? can he be slubing? can we be slubing? can you be slubing? can they be slubing?
Perfect	V-ing perfect
can I have slubed? can you have slubed? can he have slubed? can we have slubed? can you have slubed? can they have slubed?	can I have been slubing? can you have been slubing? can he have been slubing? can we have been slubing? can you have been slubing? can they have been slubing?

Interro-negative form

Simple form	V-ing form
can't I slub? can't you slub? can't he slub? can't we slub? can't you slub? can't they slub?	can't I be slubing? can't you be slubing? can't he be slubing? can't we be slubing? can't you be slubing? can't they be slubing?
Perfect	V-ing perfect
can't I have slubed? can't you have slubed? can't he have slubed? can't we have slubed? can't you have slubed? can't they have slubed?	can't I have been slubing? can't you have been slubing? can't he have been slubing? can't we have been slubing? can't you have been slubing? can't they have been slubing?