English verb conjugation
CAN UNFASTEN

Regular verb: unfasten - unfastened - unfastened

Affirmation

Simple form	V-ing form
I can unfasten you can unfasten he can unfasten we can unfasten you can unfasten they can unfasten	I can be unfastening you can be unfastening he can be unfastening we can be unfastening you can be unfastening they can be unfastening
Perfect	V-ing perfect
I can have unfastened you can have unfastened he can have unfastened we can have unfastened you can have unfastened they can have unfastened	I can have been unfastening you can have been unfastening he can have been unfastening we can have been unfastening you can have been unfastening they can have been unfastening

Negation

Simple form	V-ing form
I can't unfasten you can't unfasten he can't unfasten we can't unfasten you can't unfasten they can't unfasten	I can't be unfastening you can't be unfastening he can't be unfastening we can't be unfastening you can't be unfastening they can't be unfastening
Perfect	V-ing perfect
I can't have unfastened you can't have unfastened he can't have unfastened we can't have unfastened you can't have unfastened they can't have unfastened	I can't have been unfastening you can't have been unfastening he can't have been unfastening we can't have been unfastening you can't have been unfastening they can't have been unfastening

Interrogative form

Simple form	V-ing form
can I unfasten? can you unfasten? can he unfasten? can we unfasten? can you unfasten? can they unfasten?	can I be unfastening? can you be unfastening? can he be unfastening? can we be unfastening? can you be unfastening? can they be unfastening?
Perfect	V-ing perfect
can I have unfastened? can you have unfastened? can he have unfastened? can we have unfastened? can you have unfastened? can they have unfastened?	can I have been unfastening? can you have been unfastening? can he have been unfastening? can we have been unfastening? can you have been unfastening? can they have been unfastening?

Interro-negative form

Simple form	V-ing form
can't I unfasten? can't you unfasten? can't he unfasten? can't we unfasten? can't you unfasten? can't they unfasten?	can't I be unfastening? can't you be unfastening? can't he be unfastening? can't we be unfastening? can't you be unfastening? can't they be unfastening?
Perfect	V-ing perfect
can't I have unfastened? can't you have unfastened? can't he have unfastened? can't we have unfastened? can't you have unfastened? can't they have unfastened?	can't I have been unfastening? can't you have been unfastening? can't he have been unfastening? can't we have been unfastening? can't you have been unfastening? can't they have been unfastening?