can tub
Verbo regular: tub - tubbed- tubbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can tub
you can tub
he can tub
we can tub
you can tub
they can tub 	I can be tubbing
you can be tubbing
he can be tubbing
we can be tubbing
you can be tubbing
they can be tubbing	I can have tubbed
you can have tubbed
he can have tubbed
we can have tubbed
you can have tubbed
they can have tubbed	I can have been tubbing
you can have been tubbing
he can have been tubbing
we can have been tubbing
you can have been tubbing
they can have been tubbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot tub
you cannot tub
he cannot tub
we cannot tub
you cannot tub
they cannot tub 	I cannot be tubbing
you cannot be tubbing
he cannot be tubbing
we cannot be tubbing
you cannot be tubbing
they cannot be tubbing	I cannot have tubbed
you cannot have tubbed
he cannot have tubbed
we cannot have tubbed
you cannot have tubbed
they cannot have tubbed	I cannot have been tubbing
you cannot have been tubbing
he cannot have been tubbing
we cannot have been tubbing
you cannot have been tubbing
they cannot have been tubbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I tub?
can you tub?
can he tub?
can we tub?
can you tub?
can they tub? 	can I be tubbing?
can you be tubbing?
can he be tubbing?
can we be tubbing?
can you be tubbing?
can they be tubbing? 	can I have tubbed?
can you have tubbed?
can he have tubbed?
can we have tubbed?
can you have tubbed?
can they have tubbed? 	can I have been tubbing?
can you have been tubbing?
can he have been tubbing?
can we have been tubbing?
can you have been tubbing?
can they have been tubbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not tub?
can you not tub?
can he not tub?
can we not tub?
can you not tub?
can they not tub? 	can I not be tubbing?
can you not be tubbing?
can he not be tubbing?
can we not be tubbing?
can you not be tubbing?
can they not be tubbing? 	can I not have tubbed?
can you not have tubbed?
can he not have tubbed?
can we not have tubbed?
can you not have tubbed?
can they not have tubbed? 	can I not have been tubbing?
can you not have been tubbing?
can he not have been tubbing?
can we not have been tubbing?
can you not have been tubbing?
can they not have been tubbing?