can study
Regular verb: study - studied- studied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can study
you can study
he can study
we can study
you can study
they can study 	I can be studying
you can be studying
he can be studying
we can be studying
you can be studying
they can be studying	I can have studied
you can have studied
he can have studied
we can have studied
you can have studied
they can have studied	I can have been studying
you can have been studying
he can have been studying
we can have been studying
you can have been studying
they can have been studying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't study
you can't study
he can't study
we can't study
you can't study
they can't study 	I can't be studying
you can't be studying
he can't be studying
we can't be studying
you can't be studying
they can't be studying	I can't have studied
you can't have studied
he can't have studied
we can't have studied
you can't have studied
they can't have studied	I can't have been studying
you can't have been studying
he can't have been studying
we can't have been studying
you can't have been studying
they can't have been studying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I study?
can you study?
can he study?
can we study?
can you study?
can they study? 	can I be studying?
can you be studying?
can he be studying?
can we be studying?
can you be studying?
can they be studying? 	can I have studied?
can you have studied?
can he have studied?
can we have studied?
can you have studied?
can they have studied? 	can I have been studying?
can you have been studying?
can he have been studying?
can we have been studying?
can you have been studying?
can they have been studying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I study?
can't you study?
can't he study?
can't we study?
can't you study?
can't they study? 	can't I be studying?
can't you be studying?
can't he be studying?
can't we be studying?
can't you be studying?
can't they be studying? 	can't I have studied?
can't you have studied?
can't he have studied?
can't we have studied?
can't you have studied?
can't they have studied? 	can't I have been studying?
can't you have been studying?
can't he have been studying?
can't we have been studying?
can't you have been studying?
can't they have been studying?