could undercharge
Regular verb: undercharge - undercharged- undercharged

Affirmation 	
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I could undercharge
you could undercharge
he could undercharge
we could undercharge
you could undercharge
they could undercharge 	I could be undercharging
you could be undercharging
he could be undercharging
we could be undercharging
you could be undercharging
they could be undercharging	I could have undercharged
you could have undercharged
he could have undercharged
we could have undercharged
you could have undercharged
they could have undercharged	I could have been undercharging
you could have been undercharging
he could have been undercharging
we could have been undercharging
you could have been undercharging
they could have been undercharging	

Negation 	
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I couldn't undercharge
you couldn't undercharge
he couldn't undercharge
we couldn't undercharge
you couldn't undercharge
they couldn't undercharge 	I couldn't be undercharging
you couldn't be undercharging
he couldn't be undercharging
we couldn't be undercharging
you couldn't be undercharging
they couldn't be undercharging	I couldn't have undercharged
you couldn't have undercharged
he couldn't have undercharged
we couldn't have undercharged
you couldn't have undercharged
they couldn't have undercharged	I couldn't have been undercharging
you couldn't have been undercharging
he couldn't have been undercharging
we couldn't have been undercharging
you couldn't have been undercharging
they couldn't have been undercharging	

Interrogative form 	
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could I undercharge?
could you undercharge?
could he undercharge?
could we undercharge?
could you undercharge?
could they undercharge? 	could I be undercharging?
could you be undercharging?
could he be undercharging?
could we be undercharging?
could you be undercharging?
could they be undercharging? 	could I have undercharged?
could you have undercharged?
could he have undercharged?
could we have undercharged?
could you have undercharged?
could they have undercharged? 	could I have been undercharging?
could you have been undercharging?
could he have been undercharging?
could we have been undercharging?
could you have been undercharging?
could they have been undercharging? 	

Interro-negative form 	
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couldn't I undercharge?
couldn't you undercharge?
couldn't he undercharge?
couldn't we undercharge?
couldn't you undercharge?
couldn't they undercharge? 	couldn't I be undercharging?
couldn't you be undercharging?
couldn't he be undercharging?
couldn't we be undercharging?
couldn't you be undercharging?
couldn't they be undercharging? 	couldn't I have undercharged?
couldn't you have undercharged?
couldn't he have undercharged?
couldn't we have undercharged?
couldn't you have undercharged?
couldn't they have undercharged? 	couldn't I have been undercharging?
couldn't you have been undercharging?
couldn't he have been undercharging?
couldn't we have been undercharging?
couldn't you have been undercharging?
couldn't they have been undercharging?