should thorn
Regular verb: thorn - thorned- thorned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd thorn
you'd thorn
he'd thorn
we'd thorn
you'd thorn
they'd thorn 	I'd be thorning
you'd be thorning
he'd be thorning
we'd be thorning
you'd be thorning
they'd be thorning	I should've thorned
you should've thorned
he should've thorned
we should've thorned
you should've thorned
they should've thorned	I should've been thorning
you should've been thorning
he should've been thorning
we should've been thorning
you should've been thorning
they should've been thorning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't thorn
you shouldn't thorn
he shouldn't thorn
we shouldn't thorn
you shouldn't thorn
they shouldn't thorn 	I shouldn't be thorning
you shouldn't be thorning
he shouldn't be thorning
we shouldn't be thorning
you shouldn't be thorning
they shouldn't be thorning	I shouldn't have thorned
you shouldn't have thorned
he shouldn't have thorned
we shouldn't have thorned
you shouldn't have thorned
they shouldn't have thorned	I shouldn't have been thorning
you shouldn't have been thorning
he shouldn't have been thorning
we shouldn't have been thorning
you shouldn't have been thorning
they shouldn't have been thorning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I thorn?
should you thorn?
should he thorn?
should we thorn?
should you thorn?
should they thorn? 	should I be thorning?
should you be thorning?
should he be thorning?
should we be thorning?
should you be thorning?
should they be thorning? 	should I have thorned?
should you have thorned?
should he have thorned?
should we have thorned?
should you have thorned?
should they have thorned? 	should I have been thorning?
should you have been thorning?
should he have been thorning?
should we have been thorning?
should you have been thorning?
should they have been thorning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I thorn?
shouldn't you thorn?
shouldn't he thorn?
shouldn't we thorn?
shouldn't you thorn?
shouldn't they thorn? 	shouldn't I be thorning?
shouldn't you be thorning?
shouldn't he be thorning?
shouldn't we be thorning?
shouldn't you be thorning?
shouldn't they be thorning? 	shouldn't I have thorned?
shouldn't you have thorned?
shouldn't he have thorned?
shouldn't we have thorned?
shouldn't you have thorned?
shouldn't they have thorned? 	shouldn't I have been thorning?
shouldn't you have been thorning?
shouldn't he have been thorning?
shouldn't we have been thorning?
shouldn't you have been thorning?
shouldn't they have been thorning?