should mull
Regular verb: mull - mulled- mulled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd mull
you'd mull
she'd mull
we'd mull
you'd mull
they'd mull 	I'd be mulling
you'd be mulling
she'd be mulling
we'd be mulling
you'd be mulling
they'd be mulling	I should've mulled
you should've mulled
she should've mulled
we should've mulled
you should've mulled
they should've mulled	I should've been mulling
you should've been mulling
she should've been mulling
we should've been mulling
you should've been mulling
they should've been mulling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't mull
you shouldn't mull
she shouldn't mull
we shouldn't mull
you shouldn't mull
they shouldn't mull 	I shouldn't be mulling
you shouldn't be mulling
she shouldn't be mulling
we shouldn't be mulling
you shouldn't be mulling
they shouldn't be mulling	I shouldn't have mulled
you shouldn't have mulled
she shouldn't have mulled
we shouldn't have mulled
you shouldn't have mulled
they shouldn't have mulled	I shouldn't have been mulling
you shouldn't have been mulling
she shouldn't have been mulling
we shouldn't have been mulling
you shouldn't have been mulling
they shouldn't have been mulling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I mull?
should you mull?
should she mull?
should we mull?
should you mull?
should they mull? 	should I be mulling?
should you be mulling?
should she be mulling?
should we be mulling?
should you be mulling?
should they be mulling? 	should I have mulled?
should you have mulled?
should she have mulled?
should we have mulled?
should you have mulled?
should they have mulled? 	should I have been mulling?
should you have been mulling?
should she have been mulling?
should we have been mulling?
should you have been mulling?
should they have been mulling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I mull?
shouldn't you mull?
shouldn't she mull?
shouldn't we mull?
shouldn't you mull?
shouldn't they mull? 	shouldn't I be mulling?
shouldn't you be mulling?
shouldn't she be mulling?
shouldn't we be mulling?
shouldn't you be mulling?
shouldn't they be mulling? 	shouldn't I have mulled?
shouldn't you have mulled?
shouldn't she have mulled?
shouldn't we have mulled?
shouldn't you have mulled?
shouldn't they have mulled? 	shouldn't I have been mulling?
shouldn't you have been mulling?
shouldn't she have been mulling?
shouldn't we have been mulling?
shouldn't you have been mulling?
shouldn't they have been mulling?