could tut
Verbo regular: tut - tuted- tuted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could tut
you could tut
he could tut
we could tut
you could tut
they could tut 	I could be tuting
you could be tuting
he could be tuting
we could be tuting
you could be tuting
they could be tuting	I could have tuted
you could have tuted
he could have tuted
we could have tuted
you could have tuted
they could have tuted	I could have been tuting
you could have been tuting
he could have been tuting
we could have been tuting
you could have been tuting
they could have been tuting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not tut
you could not tut
he could not tut
we could not tut
you could not tut
they could not tut 	I could not be tuting
you could not be tuting
he could not be tuting
we could not be tuting
you could not be tuting
they could not be tuting	I could not have tuted
you could not have tuted
he could not have tuted
we could not have tuted
you could not have tuted
they could not have tuted	I could not have been tuting
you could not have been tuting
he could not have been tuting
we could not have been tuting
you could not have been tuting
they could not have been tuting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I tut?
could you tut?
could he tut?
could we tut?
could you tut?
could they tut? 	could I be tuting?
could you be tuting?
could he be tuting?
could we be tuting?
could you be tuting?
could they be tuting? 	could I have tuted?
could you have tuted?
could he have tuted?
could we have tuted?
could you have tuted?
could they have tuted? 	could I have been tuting?
could you have been tuting?
could he have been tuting?
could we have been tuting?
could you have been tuting?
could they have been tuting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not tut?
could you not tut?
could he not tut?
could we not tut?
could you not tut?
could they not tut? 	could I not be tuting?
could you not be tuting?
could he not be tuting?
could we not be tuting?
could you not be tuting?
could they not be tuting? 	could I not have tuted?
could you not have tuted?
could he not have tuted?
could we not have tuted?
could you not have tuted?
could they not have tuted? 	could I not have been tuting?
could you not have been tuting?
could he not have been tuting?
could we not have been tuting?
could you not have been tuting?
could they not have been tuting?