English verb conjugation
COULD FATIGUE

Regular verb: fatigue - fatigued - fatigued

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?