can stud
Verbo regular: stud - studded- studded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can stud
you can stud
he can stud
we can stud
you can stud
they can stud 	I can be studding
you can be studding
he can be studding
we can be studding
you can be studding
they can be studding	I can have studded
you can have studded
he can have studded
we can have studded
you can have studded
they can have studded	I can have been studding
you can have been studding
he can have been studding
we can have been studding
you can have been studding
they can have been studding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't stud
you can't stud
he can't stud
we can't stud
you can't stud
they can't stud 	I can't be studding
you can't be studding
he can't be studding
we can't be studding
you can't be studding
they can't be studding	I can't have studded
you can't have studded
he can't have studded
we can't have studded
you can't have studded
they can't have studded	I can't have been studding
you can't have been studding
he can't have been studding
we can't have been studding
you can't have been studding
they can't have been studding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I stud?
can you stud?
can he stud?
can we stud?
can you stud?
can they stud? 	can I be studding?
can you be studding?
can he be studding?
can we be studding?
can you be studding?
can they be studding? 	can I have studded?
can you have studded?
can he have studded?
can we have studded?
can you have studded?
can they have studded? 	can I have been studding?
can you have been studding?
can he have been studding?
can we have been studding?
can you have been studding?
can they have been studding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I stud?
can't you stud?
can't he stud?
can't we stud?
can't you stud?
can't they stud? 	can't I be studding?
can't you be studding?
can't he be studding?
can't we be studding?
can't you be studding?
can't they be studding? 	can't I have studded?
can't you have studded?
can't he have studded?
can't we have studded?
can't you have studded?
can't they have studded? 	can't I have been studding?
can't you have been studding?
can't he have been studding?
can't we have been studding?
can't you have been studding?
can't they have been studding?