can form
Verbo regular: form - formed- formed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can form
you can form
she can form
we can form
you can form
they can form 	I can be forming
you can be forming
she can be forming
we can be forming
you can be forming
they can be forming	I can have formed
you can have formed
she can have formed
we can have formed
you can have formed
they can have formed	I can have been forming
you can have been forming
she can have been forming
we can have been forming
you can have been forming
they can have been forming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot form
you cannot form
she cannot form
we cannot form
you cannot form
they cannot form 	I cannot be forming
you cannot be forming
she cannot be forming
we cannot be forming
you cannot be forming
they cannot be forming	I cannot have formed
you cannot have formed
she cannot have formed
we cannot have formed
you cannot have formed
they cannot have formed	I cannot have been forming
you cannot have been forming
she cannot have been forming
we cannot have been forming
you cannot have been forming
they cannot have been forming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I form?
can you form?
can she form?
can we form?
can you form?
can they form? 	can I be forming?
can you be forming?
can she be forming?
can we be forming?
can you be forming?
can they be forming? 	can I have formed?
can you have formed?
can she have formed?
can we have formed?
can you have formed?
can they have formed? 	can I have been forming?
can you have been forming?
can she have been forming?
can we have been forming?
can you have been forming?
can they have been forming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not form?
can you not form?
can she not form?
can we not form?
can you not form?
can they not form? 	can I not be forming?
can you not be forming?
can she not be forming?
can we not be forming?
can you not be forming?
can they not be forming? 	can I not have formed?
can you not have formed?
can she not have formed?
can we not have formed?
can you not have formed?
can they not have formed? 	can I not have been forming?
can you not have been forming?
can she not have been forming?
can we not have been forming?
can you not have been forming?
can they not have been forming?