should fast
Verbo regular: fast - fasted- fasted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd fast
you'd fast
he'd fast
we'd fast
you'd fast
they'd fast 	I'd be fasting
you'd be fasting
he'd be fasting
we'd be fasting
you'd be fasting
they'd be fasting	I should've fasted
you should've fasted
he should've fasted
we should've fasted
you should've fasted
they should've fasted	I should've been fasting
you should've been fasting
he should've been fasting
we should've been fasting
you should've been fasting
they should've been fasting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't fast
you shouldn't fast
he shouldn't fast
we shouldn't fast
you shouldn't fast
they shouldn't fast 	I shouldn't be fasting
you shouldn't be fasting
he shouldn't be fasting
we shouldn't be fasting
you shouldn't be fasting
they shouldn't be fasting	I shouldn't have fasted
you shouldn't have fasted
he shouldn't have fasted
we shouldn't have fasted
you shouldn't have fasted
they shouldn't have fasted	I shouldn't have been fasting
you shouldn't have been fasting
he shouldn't have been fasting
we shouldn't have been fasting
you shouldn't have been fasting
they shouldn't have been fasting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I fast?
should you fast?
should he fast?
should we fast?
should you fast?
should they fast? 	should I be fasting?
should you be fasting?
should he be fasting?
should we be fasting?
should you be fasting?
should they be fasting? 	should I have fasted?
should you have fasted?
should he have fasted?
should we have fasted?
should you have fasted?
should they have fasted? 	should I have been fasting?
should you have been fasting?
should he have been fasting?
should we have been fasting?
should you have been fasting?
should they have been fasting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I fast?
shouldn't you fast?
shouldn't he fast?
shouldn't we fast?
shouldn't you fast?
shouldn't they fast? 	shouldn't I be fasting?
shouldn't you be fasting?
shouldn't he be fasting?
shouldn't we be fasting?
shouldn't you be fasting?
shouldn't they be fasting? 	shouldn't I have fasted?
shouldn't you have fasted?
shouldn't he have fasted?
shouldn't we have fasted?
shouldn't you have fasted?
shouldn't they have fasted? 	shouldn't I have been fasting?
shouldn't you have been fasting?
shouldn't he have been fasting?
shouldn't we have been fasting?
shouldn't you have been fasting?
shouldn't they have been fasting?