should scumble
Regular verb: scumble - scumbled- scumbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd scumble
you'd scumble
he'd scumble
we'd scumble
you'd scumble
they'd scumble 	I'd be scumbling
you'd be scumbling
he'd be scumbling
we'd be scumbling
you'd be scumbling
they'd be scumbling	I should've scumbled
you should've scumbled
he should've scumbled
we should've scumbled
you should've scumbled
they should've scumbled	I should've been scumbling
you should've been scumbling
he should've been scumbling
we should've been scumbling
you should've been scumbling
they should've been scumbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't scumble
you shouldn't scumble
he shouldn't scumble
we shouldn't scumble
you shouldn't scumble
they shouldn't scumble 	I shouldn't be scumbling
you shouldn't be scumbling
he shouldn't be scumbling
we shouldn't be scumbling
you shouldn't be scumbling
they shouldn't be scumbling	I shouldn't have scumbled
you shouldn't have scumbled
he shouldn't have scumbled
we shouldn't have scumbled
you shouldn't have scumbled
they shouldn't have scumbled	I shouldn't have been scumbling
you shouldn't have been scumbling
he shouldn't have been scumbling
we shouldn't have been scumbling
you shouldn't have been scumbling
they shouldn't have been scumbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I scumble?
should you scumble?
should he scumble?
should we scumble?
should you scumble?
should they scumble? 	should I be scumbling?
should you be scumbling?
should he be scumbling?
should we be scumbling?
should you be scumbling?
should they be scumbling? 	should I have scumbled?
should you have scumbled?
should he have scumbled?
should we have scumbled?
should you have scumbled?
should they have scumbled? 	should I have been scumbling?
should you have been scumbling?
should he have been scumbling?
should we have been scumbling?
should you have been scumbling?
should they have been scumbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I scumble?
shouldn't you scumble?
shouldn't he scumble?
shouldn't we scumble?
shouldn't you scumble?
shouldn't they scumble? 	shouldn't I be scumbling?
shouldn't you be scumbling?
shouldn't he be scumbling?
shouldn't we be scumbling?
shouldn't you be scumbling?
shouldn't they be scumbling? 	shouldn't I have scumbled?
shouldn't you have scumbled?
shouldn't he have scumbled?
shouldn't we have scumbled?
shouldn't you have scumbled?
shouldn't they have scumbled? 	shouldn't I have been scumbling?
shouldn't you have been scumbling?
shouldn't he have been scumbling?
shouldn't we have been scumbling?
shouldn't you have been scumbling?
shouldn't they have been scumbling?