English verb conjugation
CAN PREALTER

Regular verb: prealter - prealtered - prealtered

Affirmation

Simple form	V-ing form
I can prealter you can prealter she can prealter we can prealter you can prealter they can prealter	I can be prealtering you can be prealtering she can be prealtering we can be prealtering you can be prealtering they can be prealtering
Perfect	V-ing perfect
I can have prealtered you can have prealtered she can have prealtered we can have prealtered you can have prealtered they can have prealtered	I can have been prealtering you can have been prealtering she can have been prealtering we can have been prealtering you can have been prealtering they can have been prealtering

Negation

Simple form	V-ing form
I cannot prealter you cannot prealter she cannot prealter we cannot prealter you cannot prealter they cannot prealter	I cannot be prealtering you cannot be prealtering she cannot be prealtering we cannot be prealtering you cannot be prealtering they cannot be prealtering
Perfect	V-ing perfect
I cannot have prealtered you cannot have prealtered she cannot have prealtered we cannot have prealtered you cannot have prealtered they cannot have prealtered	I cannot have been prealtering you cannot have been prealtering she cannot have been prealtering we cannot have been prealtering you cannot have been prealtering they cannot have been prealtering

Interrogative form

Simple form	V-ing form
can I prealter? can you prealter? can she prealter? can we prealter? can you prealter? can they prealter?	can I be prealtering? can you be prealtering? can she be prealtering? can we be prealtering? can you be prealtering? can they be prealtering?
Perfect	V-ing perfect
can I have prealtered? can you have prealtered? can she have prealtered? can we have prealtered? can you have prealtered? can they have prealtered?	can I have been prealtering? can you have been prealtering? can she have been prealtering? can we have been prealtering? can you have been prealtering? can they have been prealtering?

Interro-negative form

Simple form	V-ing form
can I not prealter? can you not prealter? can she not prealter? can we not prealter? can you not prealter? can they not prealter?	can I not be prealtering? can you not be prealtering? can she not be prealtering? can we not be prealtering? can you not be prealtering? can they not be prealtering?
Perfect	V-ing perfect
can I not have prealtered? can you not have prealtered? can she not have prealtered? can we not have prealtered? can you not have prealtered? can they not have prealtered?	can I not have been prealtering? can you not have been prealtering? can she not have been prealtering? can we not have been prealtering? can you not have been prealtering? can they not have been prealtering?