should thwart
Regular verb: thwart - thwarted- thwarted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd thwart
you'd thwart
she'd thwart
we'd thwart
you'd thwart
they'd thwart 	I'd be thwarting
you'd be thwarting
she'd be thwarting
we'd be thwarting
you'd be thwarting
they'd be thwarting	I should've thwarted
you should've thwarted
she should've thwarted
we should've thwarted
you should've thwarted
they should've thwarted	I should've been thwarting
you should've been thwarting
she should've been thwarting
we should've been thwarting
you should've been thwarting
they should've been thwarting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't thwart
you shouldn't thwart
she shouldn't thwart
we shouldn't thwart
you shouldn't thwart
they shouldn't thwart 	I shouldn't be thwarting
you shouldn't be thwarting
she shouldn't be thwarting
we shouldn't be thwarting
you shouldn't be thwarting
they shouldn't be thwarting	I shouldn't have thwarted
you shouldn't have thwarted
she shouldn't have thwarted
we shouldn't have thwarted
you shouldn't have thwarted
they shouldn't have thwarted	I shouldn't have been thwarting
you shouldn't have been thwarting
she shouldn't have been thwarting
we shouldn't have been thwarting
you shouldn't have been thwarting
they shouldn't have been thwarting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I thwart?
should you thwart?
should she thwart?
should we thwart?
should you thwart?
should they thwart? 	should I be thwarting?
should you be thwarting?
should she be thwarting?
should we be thwarting?
should you be thwarting?
should they be thwarting? 	should I have thwarted?
should you have thwarted?
should she have thwarted?
should we have thwarted?
should you have thwarted?
should they have thwarted? 	should I have been thwarting?
should you have been thwarting?
should she have been thwarting?
should we have been thwarting?
should you have been thwarting?
should they have been thwarting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I thwart?
shouldn't you thwart?
shouldn't she thwart?
shouldn't we thwart?
shouldn't you thwart?
shouldn't they thwart? 	shouldn't I be thwarting?
shouldn't you be thwarting?
shouldn't she be thwarting?
shouldn't we be thwarting?
shouldn't you be thwarting?
shouldn't they be thwarting? 	shouldn't I have thwarted?
shouldn't you have thwarted?
shouldn't she have thwarted?
shouldn't we have thwarted?
shouldn't you have thwarted?
shouldn't they have thwarted? 	shouldn't I have been thwarting?
shouldn't you have been thwarting?
shouldn't she have been thwarting?
shouldn't we have been thwarting?
shouldn't you have been thwarting?
shouldn't they have been thwarting?