could enroll
Verbo regular: enroll - enrolled- enrolled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could enroll
you could enroll
he could enroll
we could enroll
you could enroll
they could enroll 	I could be enrolling
you could be enrolling
he could be enrolling
we could be enrolling
you could be enrolling
they could be enrolling	I could have enrolled
you could have enrolled
he could have enrolled
we could have enrolled
you could have enrolled
they could have enrolled	I could have been enrolling
you could have been enrolling
he could have been enrolling
we could have been enrolling
you could have been enrolling
they could have been enrolling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't enroll
you couldn't enroll
he couldn't enroll
we couldn't enroll
you couldn't enroll
they couldn't enroll 	I couldn't be enrolling
you couldn't be enrolling
he couldn't be enrolling
we couldn't be enrolling
you couldn't be enrolling
they couldn't be enrolling	I couldn't have enrolled
you couldn't have enrolled
he couldn't have enrolled
we couldn't have enrolled
you couldn't have enrolled
they couldn't have enrolled	I couldn't have been enrolling
you couldn't have been enrolling
he couldn't have been enrolling
we couldn't have been enrolling
you couldn't have been enrolling
they couldn't have been enrolling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I enroll?
could you enroll?
could he enroll?
could we enroll?
could you enroll?
could they enroll? 	could I be enrolling?
could you be enrolling?
could he be enrolling?
could we be enrolling?
could you be enrolling?
could they be enrolling? 	could I have enrolled?
could you have enrolled?
could he have enrolled?
could we have enrolled?
could you have enrolled?
could they have enrolled? 	could I have been enrolling?
could you have been enrolling?
could he have been enrolling?
could we have been enrolling?
could you have been enrolling?
could they have been enrolling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I enroll?
couldn't you enroll?
couldn't he enroll?
couldn't we enroll?
couldn't you enroll?
couldn't they enroll? 	couldn't I be enrolling?
couldn't you be enrolling?
couldn't he be enrolling?
couldn't we be enrolling?
couldn't you be enrolling?
couldn't they be enrolling? 	couldn't I have enrolled?
couldn't you have enrolled?
couldn't he have enrolled?
couldn't we have enrolled?
couldn't you have enrolled?
couldn't they have enrolled? 	couldn't I have been enrolling?
couldn't you have been enrolling?
couldn't he have been enrolling?
couldn't we have been enrolling?
couldn't you have been enrolling?
couldn't they have been enrolling?