should mull
Regular verb: mull - mulled- mulled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd mull
you'd mull
he'd mull
we'd mull
you'd mull
they'd mull 	I'd be mulling
you'd be mulling
he'd be mulling
we'd be mulling
you'd be mulling
they'd be mulling	I should've mulled
you should've mulled
he 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
he 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
he 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
he 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
he 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
he 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 he mull?
should we mull?
should you mull?
should they mull? 	should I be mulling?
should you be mulling?
should he be mulling?
should we be mulling?
should you be mulling?
should they be mulling? 	should I have mulled?
should you have mulled?
should he 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 he 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 he 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 he 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 he 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 he have been mulling?
shouldn't we have been mulling?
shouldn't you have been mulling?
shouldn't they have been mulling?