could tub tub
Verbe régulier : tub tub - tub tubed- tub tubed

, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could tub tub
you could tub tub
he could tub tub
we could tub tub
you could tub tub
they could tub tub 	I could be tub tubing
you could be tub tubing
he could be tub tubing
we could be tub tubing
you could be tub tubing
they could be tub tubing	I could have tub tubed
you could have tub tubed
he could have tub tubed
we could have tub tubed
you could have tub tubed
they could have tub tubed	I could have been tub tubing
you could have been tub tubing
he could have been tub tubing
we could have been tub tubing
you could have been tub tubing
they could have been tub tubing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not tub tub
you could not tub tub
he could not tub tub
we could not tub tub
you could not tub tub
they could not tub tub 	I could not be tub tubing
you could not be tub tubing
he could not be tub tubing
we could not be tub tubing
you could not be tub tubing
they could not be tub tubing	I could not have tub tubed
you could not have tub tubed
he could not have tub tubed
we could not have tub tubed
you could not have tub tubed
they could not have tub tubed	I could not have been tub tubing
you could not have been tub tubing
he could not have been tub tubing
we could not have been tub tubing
you could not have been tub tubing
they could not have been tub tubing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I tub tub?
could you tub tub?
could he tub tub?
could we tub tub?
could you tub tub?
could they tub tub? 	could I be tub tubing?
could you be tub tubing?
could he be tub tubing?
could we be tub tubing?
could you be tub tubing?
could they be tub tubing? 	could I have tub tubed?
could you have tub tubed?
could he have tub tubed?
could we have tub tubed?
could you have tub tubed?
could they have tub tubed? 	could I have been tub tubing?
could you have been tub tubing?
could he have been tub tubing?
could we have been tub tubing?
could you have been tub tubing?
could they have been tub tubing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not tub tub?
could you not tub tub?
could he not tub tub?
could we not tub tub?
could you not tub tub?
could they not tub tub? 	could I not be tub tubing?
could you not be tub tubing?
could he not be tub tubing?
could we not be tub tubing?
could you not be tub tubing?
could they not be tub tubing? 	could I not have tub tubed?
could you not have tub tubed?
could he not have tub tubed?
could we not have tub tubed?
could you not have tub tubed?
could they not have tub tubed? 	could I not have been tub tubing?
could you not have been tub tubing?
could he not have been tub tubing?
could we not have been tub tubing?
could you not have been tub tubing?
could they not have been tub tubing?