should fast
Regular verb: fast - fasted- fasted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd fast
you'd fast
she'd fast
we'd fast
you'd fast
they'd fast 	I'd be fasting
you'd be fasting
she'd be fasting
we'd be fasting
you'd be fasting
they'd be fasting	I should've fasted
you should've fasted
she 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
she should've been fasting
we should've been fasting
you should've been fasting
they should've been fasting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't fast
you shouldn't fast
she 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
she 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
she 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
she shouldn't have been fasting
we shouldn't have been fasting
you shouldn't have been fasting
they shouldn't have been fasting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I fast?
should you fast?
should she fast?
should we fast?
should you fast?
should they fast? 	should I be fasting?
should you be fasting?
should she be fasting?
should we be fasting?
should you be fasting?
should they be fasting? 	should I have fasted?
should you have fasted?
should she 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 she have been fasting?
should we have been fasting?
should you have been fasting?
should they have been fasting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I fast?
shouldn't you fast?
shouldn't she 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 she 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 she 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 she have been fasting?
shouldn't we have been fasting?
shouldn't you have been fasting?
shouldn't they have been fasting?