could fatigue
Verbo regular: fatigue - fatigued- fatigued

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fatigue
you could fatigue
he could fatigue
we could fatigue
you could fatigue
they could fatigue 	I could be fatiguing
you could be fatiguing
he could be fatiguing
we could be fatiguing
you could be fatiguing
they could be fatiguing	I could have fatigued
you could have fatigued
he could have fatigued
we could have fatigued
you could have fatigued
they could have fatigued	I could have been fatiguing
you could have been fatiguing
he could have been fatiguing
we could have been fatiguing
you could have been fatiguing
they could have been fatiguing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not fatigue
you could not fatigue
he could not fatigue
we could not fatigue
you could not fatigue
they could not fatigue 	I could not be fatiguing
you could not be fatiguing
he could not be fatiguing
we could not be fatiguing
you could not be fatiguing
they could not be fatiguing	I could not have fatigued
you could not have fatigued
he could not have fatigued
we could not have fatigued
you could not have fatigued
they could not have fatigued	I could not have been fatiguing
you could not have been fatiguing
he could not have been fatiguing
we could not have been fatiguing
you could not have been fatiguing
they could not have been fatiguing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fatigue?
could you fatigue?
could he fatigue?
could we fatigue?
could you fatigue?
could they fatigue? 	could I be fatiguing?
could you be fatiguing?
could he be fatiguing?
could we be fatiguing?
could you be fatiguing?
could they be fatiguing? 	could I have fatigued?
could you have fatigued?
could he have fatigued?
could we have fatigued?
could you have fatigued?
could they have fatigued? 	could I have been fatiguing?
could you have been fatiguing?
could he have been fatiguing?
could we have been fatiguing?
could you have been fatiguing?
could they have been fatiguing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not fatigue?
could you not fatigue?
could he not fatigue?
could we not fatigue?
could you not fatigue?
could they not fatigue? 	could I not be fatiguing?
could you not be fatiguing?
could he not be fatiguing?
could we not be fatiguing?
could you not be fatiguing?
could they not be fatiguing? 	could I not have fatigued?
could you not have fatigued?
could he not have fatigued?
could we not have fatigued?
could you not have fatigued?
could they not have fatigued? 	could I not have been fatiguing?
could you not have been fatiguing?
could he not have been fatiguing?
could we not have been fatiguing?
could you not have been fatiguing?
could they not have been fatiguing?