can smoke
Regular verb: smoke - smoked- smoked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can smoke
you can smoke
she can smoke
we can smoke
you can smoke
they can smoke 	I can be smoking
you can be smoking
she can be smoking
we can be smoking
you can be smoking
they can be smoking	I can have smoked
you can have smoked
she can have smoked
we can have smoked
you can have smoked
they can have smoked	I can have been smoking
you can have been smoking
she can have been smoking
we can have been smoking
you can have been smoking
they can have been smoking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't smoke
you can't smoke
she can't smoke
we can't smoke
you can't smoke
they can't smoke 	I can't be smoking
you can't be smoking
she can't be smoking
we can't be smoking
you can't be smoking
they can't be smoking	I can't have smoked
you can't have smoked
she can't have smoked
we can't have smoked
you can't have smoked
they can't have smoked	I can't have been smoking
you can't have been smoking
she can't have been smoking
we can't have been smoking
you can't have been smoking
they can't have been smoking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I smoke?
can you smoke?
can she smoke?
can we smoke?
can you smoke?
can they smoke? 	can I be smoking?
can you be smoking?
can she be smoking?
can we be smoking?
can you be smoking?
can they be smoking? 	can I have smoked?
can you have smoked?
can she have smoked?
can we have smoked?
can you have smoked?
can they have smoked? 	can I have been smoking?
can you have been smoking?
can she have been smoking?
can we have been smoking?
can you have been smoking?
can they have been smoking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I smoke?
can't you smoke?
can't she smoke?
can't we smoke?
can't you smoke?
can't they smoke? 	can't I be smoking?
can't you be smoking?
can't she be smoking?
can't we be smoking?
can't you be smoking?
can't they be smoking? 	can't I have smoked?
can't you have smoked?
can't she have smoked?
can't we have smoked?
can't you have smoked?
can't they have smoked? 	can't I have been smoking?
can't you have been smoking?
can't she have been smoking?
can't we have been smoking?
can't you have been smoking?
can't they have been smoking?