can stale
Verbo regular: stale - staled- staled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can stale
you can stale
he can stale
we can stale
you can stale
they can stale 	I can be staling
you can be staling
he can be staling
we can be staling
you can be staling
they can be staling	I can have staled
you can have staled
he can have staled
we can have staled
you can have staled
they can have staled	I can have been staling
you can have been staling
he can have been staling
we can have been staling
you can have been staling
they can have been staling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot stale
you cannot stale
he cannot stale
we cannot stale
you cannot stale
they cannot stale 	I cannot be staling
you cannot be staling
he cannot be staling
we cannot be staling
you cannot be staling
they cannot be staling	I cannot have staled
you cannot have staled
he cannot have staled
we cannot have staled
you cannot have staled
they cannot have staled	I cannot have been staling
you cannot have been staling
he cannot have been staling
we cannot have been staling
you cannot have been staling
they cannot have been staling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I stale?
can you stale?
can he stale?
can we stale?
can you stale?
can they stale? 	can I be staling?
can you be staling?
can he be staling?
can we be staling?
can you be staling?
can they be staling? 	can I have staled?
can you have staled?
can he have staled?
can we have staled?
can you have staled?
can they have staled? 	can I have been staling?
can you have been staling?
can he have been staling?
can we have been staling?
can you have been staling?
can they have been staling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not stale?
can you not stale?
can he not stale?
can we not stale?
can you not stale?
can they not stale? 	can I not be staling?
can you not be staling?
can he not be staling?
can we not be staling?
can you not be staling?
can they not be staling? 	can I not have staled?
can you not have staled?
can he not have staled?
can we not have staled?
can you not have staled?
can they not have staled? 	can I not have been staling?
can you not have been staling?
can he not have been staling?
can we not have been staling?
can you not have been staling?
can they not have been staling?