English verb conjugation
CAN SMART

Regular verb: smart - smarted - smarted

Affirmation

Simple form	V-ing form
I can smart you can smart he can smart we can smart you can smart they can smart	I can be smarting you can be smarting he can be smarting we can be smarting you can be smarting they can be smarting
Perfect	V-ing perfect
I can have smarted you can have smarted he can have smarted we can have smarted you can have smarted they can have smarted	I can have been smarting you can have been smarting he can have been smarting we can have been smarting you can have been smarting they can have been smarting

Negation

Simple form	V-ing form
I can't smart you can't smart he can't smart we can't smart you can't smart they can't smart	I can't be smarting you can't be smarting he can't be smarting we can't be smarting you can't be smarting they can't be smarting
Perfect	V-ing perfect
I can't have smarted you can't have smarted he can't have smarted we can't have smarted you can't have smarted they can't have smarted	I can't have been smarting you can't have been smarting he can't have been smarting we can't have been smarting you can't have been smarting they can't have been smarting

Interrogative form

Simple form	V-ing form
can I smart? can you smart? can he smart? can we smart? can you smart? can they smart?	can I be smarting? can you be smarting? can he be smarting? can we be smarting? can you be smarting? can they be smarting?
Perfect	V-ing perfect
can I have smarted? can you have smarted? can he have smarted? can we have smarted? can you have smarted? can they have smarted?	can I have been smarting? can you have been smarting? can he have been smarting? can we have been smarting? can you have been smarting? can they have been smarting?

Interro-negative form

Simple form	V-ing form
can't I smart? can't you smart? can't he smart? can't we smart? can't you smart? can't they smart?	can't I be smarting? can't you be smarting? can't he be smarting? can't we be smarting? can't you be smarting? can't they be smarting?
Perfect	V-ing perfect
can't I have smarted? can't you have smarted? can't he have smarted? can't we have smarted? can't you have smarted? can't they have smarted?	can't I have been smarting? can't you have been smarting? can't he have been smarting? can't we have been smarting? can't you have been smarting? can't they have been smarting?