English verb conjugation
CAN UNNAIL

Regular verb: unnail - unnailed - unnailed

Affirmation

Simple form	V-ing form
I can unnail you can unnail he can unnail we can unnail you can unnail they can unnail	I can be unnailing you can be unnailing he can be unnailing we can be unnailing you can be unnailing they can be unnailing
Perfect	V-ing perfect
I can have unnailed you can have unnailed he can have unnailed we can have unnailed you can have unnailed they can have unnailed	I can have been unnailing you can have been unnailing he can have been unnailing we can have been unnailing you can have been unnailing they can have been unnailing

Negation

Simple form	V-ing form
I can't unnail you can't unnail he can't unnail we can't unnail you can't unnail they can't unnail	I can't be unnailing you can't be unnailing he can't be unnailing we can't be unnailing you can't be unnailing they can't be unnailing
Perfect	V-ing perfect
I can't have unnailed you can't have unnailed he can't have unnailed we can't have unnailed you can't have unnailed they can't have unnailed	I can't have been unnailing you can't have been unnailing he can't have been unnailing we can't have been unnailing you can't have been unnailing they can't have been unnailing

Interrogative form

Simple form	V-ing form
can I unnail? can you unnail? can he unnail? can we unnail? can you unnail? can they unnail?	can I be unnailing? can you be unnailing? can he be unnailing? can we be unnailing? can you be unnailing? can they be unnailing?
Perfect	V-ing perfect
can I have unnailed? can you have unnailed? can he have unnailed? can we have unnailed? can you have unnailed? can they have unnailed?	can I have been unnailing? can you have been unnailing? can he have been unnailing? can we have been unnailing? can you have been unnailing? can they have been unnailing?

Interro-negative form

Simple form	V-ing form
can't I unnail? can't you unnail? can't he unnail? can't we unnail? can't you unnail? can't they unnail?	can't I be unnailing? can't you be unnailing? can't he be unnailing? can't we be unnailing? can't you be unnailing? can't they be unnailing?
Perfect	V-ing perfect
can't I have unnailed? can't you have unnailed? can't he have unnailed? can't we have unnailed? can't you have unnailed? can't they have unnailed?	can't I have been unnailing? can't you have been unnailing? can't he have been unnailing? can't we have been unnailing? can't you have been unnailing? can't they have been unnailing?