can saber
Verbo regular: saber - sabered- sabered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can saber
you can saber
he can saber
we can saber
you can saber
they can saber 	I can be sabering
you can be sabering
he can be sabering
we can be sabering
you can be sabering
they can be sabering	I can have sabered
you can have sabered
he can have sabered
we can have sabered
you can have sabered
they can have sabered	I can have been sabering
you can have been sabering
he can have been sabering
we can have been sabering
you can have been sabering
they can have been sabering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot saber
you cannot saber
he cannot saber
we cannot saber
you cannot saber
they cannot saber 	I cannot be sabering
you cannot be sabering
he cannot be sabering
we cannot be sabering
you cannot be sabering
they cannot be sabering	I cannot have sabered
you cannot have sabered
he cannot have sabered
we cannot have sabered
you cannot have sabered
they cannot have sabered	I cannot have been sabering
you cannot have been sabering
he cannot have been sabering
we cannot have been sabering
you cannot have been sabering
they cannot have been sabering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I saber?
can you saber?
can he saber?
can we saber?
can you saber?
can they saber? 	can I be sabering?
can you be sabering?
can he be sabering?
can we be sabering?
can you be sabering?
can they be sabering? 	can I have sabered?
can you have sabered?
can he have sabered?
can we have sabered?
can you have sabered?
can they have sabered? 	can I have been sabering?
can you have been sabering?
can he have been sabering?
can we have been sabering?
can you have been sabering?
can they have been sabering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not saber?
can you not saber?
can he not saber?
can we not saber?
can you not saber?
can they not saber? 	can I not be sabering?
can you not be sabering?
can he not be sabering?
can we not be sabering?
can you not be sabering?
can they not be sabering? 	can I not have sabered?
can you not have sabered?
can he not have sabered?
can we not have sabered?
can you not have sabered?
can they not have sabered? 	can I not have been sabering?
can you not have been sabering?
can he not have been sabering?
can we not have been sabering?
can you not have been sabering?
can they not have been sabering?