should flail
Regular verb: flail - flailed- flailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd flail
you'd flail
she'd flail
we'd flail
you'd flail
they'd flail 	I'd be flailing
you'd be flailing
she'd be flailing
we'd be flailing
you'd be flailing
they'd be flailing	I should've flailed
you should've flailed
she should've flailed
we should've flailed
you should've flailed
they should've flailed	I should've been flailing
you should've been flailing
she should've been flailing
we should've been flailing
you should've been flailing
they should've been flailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't flail
you shouldn't flail
she shouldn't flail
we shouldn't flail
you shouldn't flail
they shouldn't flail 	I shouldn't be flailing
you shouldn't be flailing
she shouldn't be flailing
we shouldn't be flailing
you shouldn't be flailing
they shouldn't be flailing	I shouldn't have flailed
you shouldn't have flailed
she shouldn't have flailed
we shouldn't have flailed
you shouldn't have flailed
they shouldn't have flailed	I shouldn't have been flailing
you shouldn't have been flailing
she shouldn't have been flailing
we shouldn't have been flailing
you shouldn't have been flailing
they shouldn't have been flailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I flail?
should you flail?
should she flail?
should we flail?
should you flail?
should they flail? 	should I be flailing?
should you be flailing?
should she be flailing?
should we be flailing?
should you be flailing?
should they be flailing? 	should I have flailed?
should you have flailed?
should she have flailed?
should we have flailed?
should you have flailed?
should they have flailed? 	should I have been flailing?
should you have been flailing?
should she have been flailing?
should we have been flailing?
should you have been flailing?
should they have been flailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I flail?
shouldn't you flail?
shouldn't she flail?
shouldn't we flail?
shouldn't you flail?
shouldn't they flail? 	shouldn't I be flailing?
shouldn't you be flailing?
shouldn't she be flailing?
shouldn't we be flailing?
shouldn't you be flailing?
shouldn't they be flailing? 	shouldn't I have flailed?
shouldn't you have flailed?
shouldn't she have flailed?
shouldn't we have flailed?
shouldn't you have flailed?
shouldn't they have flailed? 	shouldn't I have been flailing?
shouldn't you have been flailing?
shouldn't she have been flailing?
shouldn't we have been flailing?
shouldn't you have been flailing?
shouldn't they have been flailing?