should pet
Verbo regular: pet - petted- petted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd pet
you'd pet
he'd pet
we'd pet
you'd pet
they'd pet 	I'd be petting
you'd be petting
he'd be petting
we'd be petting
you'd be petting
they'd be petting	I should've petted
you should've petted
he should've petted
we should've petted
you should've petted
they should've petted	I should've been petting
you should've been petting
he should've been petting
we should've been petting
you should've been petting
they should've been petting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't pet
you shouldn't pet
he shouldn't pet
we shouldn't pet
you shouldn't pet
they shouldn't pet 	I shouldn't be petting
you shouldn't be petting
he shouldn't be petting
we shouldn't be petting
you shouldn't be petting
they shouldn't be petting	I shouldn't have petted
you shouldn't have petted
he shouldn't have petted
we shouldn't have petted
you shouldn't have petted
they shouldn't have petted	I shouldn't have been petting
you shouldn't have been petting
he shouldn't have been petting
we shouldn't have been petting
you shouldn't have been petting
they shouldn't have been petting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I pet?
should you pet?
should he pet?
should we pet?
should you pet?
should they pet? 	should I be petting?
should you be petting?
should he be petting?
should we be petting?
should you be petting?
should they be petting? 	should I have petted?
should you have petted?
should he have petted?
should we have petted?
should you have petted?
should they have petted? 	should I have been petting?
should you have been petting?
should he have been petting?
should we have been petting?
should you have been petting?
should they have been petting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I pet?
shouldn't you pet?
shouldn't he pet?
shouldn't we pet?
shouldn't you pet?
shouldn't they pet? 	shouldn't I be petting?
shouldn't you be petting?
shouldn't he be petting?
shouldn't we be petting?
shouldn't you be petting?
shouldn't they be petting? 	shouldn't I have petted?
shouldn't you have petted?
shouldn't he have petted?
shouldn't we have petted?
shouldn't you have petted?
shouldn't they have petted? 	shouldn't I have been petting?
shouldn't you have been petting?
shouldn't he have been petting?
shouldn't we have been petting?
shouldn't you have been petting?
shouldn't they have been petting?