could preschedule
Regular verb: preschedule - prescheduled- prescheduled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preschedule
you could preschedule
he could preschedule
we could preschedule
you could preschedule
they could preschedule 	I could be prescheduling
you could be prescheduling
he could be prescheduling
we could be prescheduling
you could be prescheduling
they could be prescheduling	I could have prescheduled
you could have prescheduled
he could have prescheduled
we could have prescheduled
you could have prescheduled
they could have prescheduled	I could have been prescheduling
you could have been prescheduling
he could have been prescheduling
we could have been prescheduling
you could have been prescheduling
they could have been prescheduling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not preschedule
you could not preschedule
he could not preschedule
we could not preschedule
you could not preschedule
they could not preschedule 	I could not be prescheduling
you could not be prescheduling
he could not be prescheduling
we could not be prescheduling
you could not be prescheduling
they could not be prescheduling	I could not have prescheduled
you could not have prescheduled
he could not have prescheduled
we could not have prescheduled
you could not have prescheduled
they could not have prescheduled	I could not have been prescheduling
you could not have been prescheduling
he could not have been prescheduling
we could not have been prescheduling
you could not have been prescheduling
they could not have been prescheduling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preschedule?
could you preschedule?
could he preschedule?
could we preschedule?
could you preschedule?
could they preschedule? 	could I be prescheduling?
could you be prescheduling?
could he be prescheduling?
could we be prescheduling?
could you be prescheduling?
could they be prescheduling? 	could I have prescheduled?
could you have prescheduled?
could he have prescheduled?
could we have prescheduled?
could you have prescheduled?
could they have prescheduled? 	could I have been prescheduling?
could you have been prescheduling?
could he have been prescheduling?
could we have been prescheduling?
could you have been prescheduling?
could they have been prescheduling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not preschedule?
could you not preschedule?
could he not preschedule?
could we not preschedule?
could you not preschedule?
could they not preschedule? 	could I not be prescheduling?
could you not be prescheduling?
could he not be prescheduling?
could we not be prescheduling?
could you not be prescheduling?
could they not be prescheduling? 	could I not have prescheduled?
could you not have prescheduled?
could he not have prescheduled?
could we not have prescheduled?
could you not have prescheduled?
could they not have prescheduled? 	could I not have been prescheduling?
could you not have been prescheduling?
could he not have been prescheduling?
could we not have been prescheduling?
could you not have been prescheduling?
could they not have been prescheduling?