can rib
Verbo regular: rib - ribed- ribed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can rib
you can rib
he can rib
we can rib
you can rib
they can rib 	I can be ribing
you can be ribing
he can be ribing
we can be ribing
you can be ribing
they can be ribing	I can have ribed
you can have ribed
he can have ribed
we can have ribed
you can have ribed
they can have ribed	I can have been ribing
you can have been ribing
he can have been ribing
we can have been ribing
you can have been ribing
they can have been ribing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot rib
you cannot rib
he cannot rib
we cannot rib
you cannot rib
they cannot rib 	I cannot be ribing
you cannot be ribing
he cannot be ribing
we cannot be ribing
you cannot be ribing
they cannot be ribing	I cannot have ribed
you cannot have ribed
he cannot have ribed
we cannot have ribed
you cannot have ribed
they cannot have ribed	I cannot have been ribing
you cannot have been ribing
he cannot have been ribing
we cannot have been ribing
you cannot have been ribing
they cannot have been ribing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I rib?
can you rib?
can he rib?
can we rib?
can you rib?
can they rib? 	can I be ribing?
can you be ribing?
can he be ribing?
can we be ribing?
can you be ribing?
can they be ribing? 	can I have ribed?
can you have ribed?
can he have ribed?
can we have ribed?
can you have ribed?
can they have ribed? 	can I have been ribing?
can you have been ribing?
can he have been ribing?
can we have been ribing?
can you have been ribing?
can they have been ribing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not rib?
can you not rib?
can he not rib?
can we not rib?
can you not rib?
can they not rib? 	can I not be ribing?
can you not be ribing?
can he not be ribing?
can we not be ribing?
can you not be ribing?
can they not be ribing? 	can I not have ribed?
can you not have ribed?
can he not have ribed?
can we not have ribed?
can you not have ribed?
can they not have ribed? 	can I not have been ribing?
can you not have been ribing?
can he not have been ribing?
can we not have been ribing?
can you not have been ribing?
can they not have been ribing?