I can fatigue you can fatigue she can fatigue we can fatigue you can fatigue they can fatigue
V-ing form
I can be fatiguing you can be fatiguing she can be fatiguing we can be fatiguing you can be fatiguing they can be fatiguing
Perfect
I can have fatigued you can have fatigued she can have fatigued we can have fatigued you can have fatigued they can have fatigued
V-ing perfect
I can have been fatiguing you can have been fatiguing she can have been fatiguing we can have been fatiguing you can have been fatiguing they can have been fatiguing
Negation
Simple form
I cannot fatigue you cannot fatigue she cannot fatigue we cannot fatigue you cannot fatigue they cannot fatigue
V-ing form
I cannot be fatiguing you cannot be fatiguing she cannot be fatiguing we cannot be fatiguing you cannot be fatiguing they cannot be fatiguing
Perfect
I cannot have fatigued you cannot have fatigued she cannot have fatigued we cannot have fatigued you cannot have fatigued they cannot have fatigued
V-ing perfect
I cannot have been fatiguing you cannot have been fatiguing she cannot have been fatiguing we cannot have been fatiguing you cannot have been fatiguing they cannot have been fatiguing
Interrogative form
Simple form
can I fatigue? can you fatigue? can she fatigue? can we fatigue? can you fatigue? can they fatigue?
V-ing form
can I be fatiguing? can you be fatiguing? can she be fatiguing? can we be fatiguing? can you be fatiguing? can they be fatiguing?
Perfect
can I have fatigued? can you have fatigued? can she have fatigued? can we have fatigued? can you have fatigued? can they have fatigued?
V-ing perfect
can I have been fatiguing? can you have been fatiguing? can she have been fatiguing? can we have been fatiguing? can you have been fatiguing? can they have been fatiguing?
Interro-negative form
Simple form
can I not fatigue? can you not fatigue? can she not fatigue? can we not fatigue? can you not fatigue? can they not fatigue?
V-ing form
can I not be fatiguing? can you not be fatiguing? can she not be fatiguing? can we not be fatiguing? can you not be fatiguing? can they not be fatiguing?
Perfect
can I not have fatigued? can you not have fatigued? can she not have fatigued? can we not have fatigued? can you not have fatigued? can they not have fatigued?
V-ing perfect
can I not have been fatiguing? can you not have been fatiguing? can she not have been fatiguing? can we not have been fatiguing? can you not have been fatiguing? can they not have been fatiguing?