English verb conjugation
COULD MUSTER

Regular verb: muster - mustered - mustered

Affirmation

Simple form	V-ing form
I could muster you could muster she could muster we could muster you could muster they could muster	I could be mustering you could be mustering she could be mustering we could be mustering you could be mustering they could be mustering
Perfect	V-ing perfect
I could have mustered you could have mustered she could have mustered we could have mustered you could have mustered they could have mustered	I could have been mustering you could have been mustering she could have been mustering we could have been mustering you could have been mustering they could have been mustering

Negation

Simple form	V-ing form
I could not muster you could not muster she could not muster we could not muster you could not muster they could not muster	I could not be mustering you could not be mustering she could not be mustering we could not be mustering you could not be mustering they could not be mustering
Perfect	V-ing perfect
I could not have mustered you could not have mustered she could not have mustered we could not have mustered you could not have mustered they could not have mustered	I could not have been mustering you could not have been mustering she could not have been mustering we could not have been mustering you could not have been mustering they could not have been mustering

Interrogative form

Simple form	V-ing form
could I muster? could you muster? could she muster? could we muster? could you muster? could they muster?	could I be mustering? could you be mustering? could she be mustering? could we be mustering? could you be mustering? could they be mustering?
Perfect	V-ing perfect
could I have mustered? could you have mustered? could she have mustered? could we have mustered? could you have mustered? could they have mustered?	could I have been mustering? could you have been mustering? could she have been mustering? could we have been mustering? could you have been mustering? could they have been mustering?

Interro-negative form

Simple form	V-ing form
could I not muster? could you not muster? could she not muster? could we not muster? could you not muster? could they not muster?	could I not be mustering? could you not be mustering? could she not be mustering? could we not be mustering? could you not be mustering? could they not be mustering?
Perfect	V-ing perfect
could I not have mustered? could you not have mustered? could she not have mustered? could we not have mustered? could you not have mustered? could they not have mustered?	could I not have been mustering? could you not have been mustering? could she not have been mustering? could we not have been mustering? could you not have been mustering? could they not have been mustering?