can case
Verbo regular: case - cased- cased

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can case
you can case
she can case
we can case
you can case
they can case 	I can be casing
you can be casing
she can be casing
we can be casing
you can be casing
they can be casing	I can have cased
you can have cased
she can have cased
we can have cased
you can have cased
they can have cased	I can have been casing
you can have been casing
she can have been casing
we can have been casing
you can have been casing
they can have been casing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot case
you cannot case
she cannot case
we cannot case
you cannot case
they cannot case 	I cannot be casing
you cannot be casing
she cannot be casing
we cannot be casing
you cannot be casing
they cannot be casing	I cannot have cased
you cannot have cased
she cannot have cased
we cannot have cased
you cannot have cased
they cannot have cased	I cannot have been casing
you cannot have been casing
she cannot have been casing
we cannot have been casing
you cannot have been casing
they cannot have been casing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I case?
can you case?
can she case?
can we case?
can you case?
can they case? 	can I be casing?
can you be casing?
can she be casing?
can we be casing?
can you be casing?
can they be casing? 	can I have cased?
can you have cased?
can she have cased?
can we have cased?
can you have cased?
can they have cased? 	can I have been casing?
can you have been casing?
can she have been casing?
can we have been casing?
can you have been casing?
can they have been casing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not case?
can you not case?
can she not case?
can we not case?
can you not case?
can they not case? 	can I not be casing?
can you not be casing?
can she not be casing?
can we not be casing?
can you not be casing?
can they not be casing? 	can I not have cased?
can you not have cased?
can she not have cased?
can we not have cased?
can you not have cased?
can they not have cased? 	can I not have been casing?
can you not have been casing?
can she not have been casing?
can we not have been casing?
can you not have been casing?
can they not have been casing?