should unknot
Regular verb: unknot - unknotted- unknotted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd unknot
you'd unknot
he'd unknot
we'd unknot
you'd unknot
they'd unknot 	I'd be unknotting
you'd be unknotting
he'd be unknotting
we'd be unknotting
you'd be unknotting
they'd be unknotting	I should've unknotted
you should've unknotted
he should've unknotted
we should've unknotted
you should've unknotted
they should've unknotted	I should've been unknotting
you should've been unknotting
he should've been unknotting
we should've been unknotting
you should've been unknotting
they should've been unknotting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't unknot
you shouldn't unknot
he shouldn't unknot
we shouldn't unknot
you shouldn't unknot
they shouldn't unknot 	I shouldn't be unknotting
you shouldn't be unknotting
he shouldn't be unknotting
we shouldn't be unknotting
you shouldn't be unknotting
they shouldn't be unknotting	I shouldn't have unknotted
you shouldn't have unknotted
he shouldn't have unknotted
we shouldn't have unknotted
you shouldn't have unknotted
they shouldn't have unknotted	I shouldn't have been unknotting
you shouldn't have been unknotting
he shouldn't have been unknotting
we shouldn't have been unknotting
you shouldn't have been unknotting
they shouldn't have been unknotting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I unknot?
should you unknot?
should he unknot?
should we unknot?
should you unknot?
should they unknot? 	should I be unknotting?
should you be unknotting?
should he be unknotting?
should we be unknotting?
should you be unknotting?
should they be unknotting? 	should I have unknotted?
should you have unknotted?
should he have unknotted?
should we have unknotted?
should you have unknotted?
should they have unknotted? 	should I have been unknotting?
should you have been unknotting?
should he have been unknotting?
should we have been unknotting?
should you have been unknotting?
should they have been unknotting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I unknot?
shouldn't you unknot?
shouldn't he unknot?
shouldn't we unknot?
shouldn't you unknot?
shouldn't they unknot? 	shouldn't I be unknotting?
shouldn't you be unknotting?
shouldn't he be unknotting?
shouldn't we be unknotting?
shouldn't you be unknotting?
shouldn't they be unknotting? 	shouldn't I have unknotted?
shouldn't you have unknotted?
shouldn't he have unknotted?
shouldn't we have unknotted?
shouldn't you have unknotted?
shouldn't they have unknotted? 	shouldn't I have been unknotting?
shouldn't you have been unknotting?
shouldn't he have been unknotting?
shouldn't we have been unknotting?
shouldn't you have been unknotting?
shouldn't they have been unknotting?