should thud
Regular verb: thud - thudded- thudded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd thud
you'd thud
she'd thud
we'd thud
you'd thud
they'd thud 	I'd be thudding
you'd be thudding
she'd be thudding
we'd be thudding
you'd be thudding
they'd be thudding	I should've thudded
you should've thudded
she should've thudded
we should've thudded
you should've thudded
they should've thudded	I should've been thudding
you should've been thudding
she should've been thudding
we should've been thudding
you should've been thudding
they should've been thudding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't thud
you shouldn't thud
she shouldn't thud
we shouldn't thud
you shouldn't thud
they shouldn't thud 	I shouldn't be thudding
you shouldn't be thudding
she shouldn't be thudding
we shouldn't be thudding
you shouldn't be thudding
they shouldn't be thudding	I shouldn't have thudded
you shouldn't have thudded
she shouldn't have thudded
we shouldn't have thudded
you shouldn't have thudded
they shouldn't have thudded	I shouldn't have been thudding
you shouldn't have been thudding
she shouldn't have been thudding
we shouldn't have been thudding
you shouldn't have been thudding
they shouldn't have been thudding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I thud?
should you thud?
should she thud?
should we thud?
should you thud?
should they thud? 	should I be thudding?
should you be thudding?
should she be thudding?
should we be thudding?
should you be thudding?
should they be thudding? 	should I have thudded?
should you have thudded?
should she have thudded?
should we have thudded?
should you have thudded?
should they have thudded? 	should I have been thudding?
should you have been thudding?
should she have been thudding?
should we have been thudding?
should you have been thudding?
should they have been thudding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I thud?
shouldn't you thud?
shouldn't she thud?
shouldn't we thud?
shouldn't you thud?
shouldn't they thud? 	shouldn't I be thudding?
shouldn't you be thudding?
shouldn't she be thudding?
shouldn't we be thudding?
shouldn't you be thudding?
shouldn't they be thudding? 	shouldn't I have thudded?
shouldn't you have thudded?
shouldn't she have thudded?
shouldn't we have thudded?
shouldn't you have thudded?
shouldn't they have thudded? 	shouldn't I have been thudding?
shouldn't you have been thudding?
shouldn't she have been thudding?
shouldn't we have been thudding?
shouldn't you have been thudding?
shouldn't they have been thudding?