should lumber
Regular verb: lumber - lumbered- lumbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd lumber
you'd lumber
he'd lumber
we'd lumber
you'd lumber
they'd lumber 	I'd be lumbering
you'd be lumbering
he'd be lumbering
we'd be lumbering
you'd be lumbering
they'd be lumbering	I should've lumbered
you should've lumbered
he should've lumbered
we should've lumbered
you should've lumbered
they should've lumbered	I should've been lumbering
you should've been lumbering
he should've been lumbering
we should've been lumbering
you should've been lumbering
they should've been lumbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't lumber
you shouldn't lumber
he shouldn't lumber
we shouldn't lumber
you shouldn't lumber
they shouldn't lumber 	I shouldn't be lumbering
you shouldn't be lumbering
he shouldn't be lumbering
we shouldn't be lumbering
you shouldn't be lumbering
they shouldn't be lumbering	I shouldn't have lumbered
you shouldn't have lumbered
he shouldn't have lumbered
we shouldn't have lumbered
you shouldn't have lumbered
they shouldn't have lumbered	I shouldn't have been lumbering
you shouldn't have been lumbering
he shouldn't have been lumbering
we shouldn't have been lumbering
you shouldn't have been lumbering
they shouldn't have been lumbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I lumber?
should you lumber?
should he lumber?
should we lumber?
should you lumber?
should they lumber? 	should I be lumbering?
should you be lumbering?
should he be lumbering?
should we be lumbering?
should you be lumbering?
should they be lumbering? 	should I have lumbered?
should you have lumbered?
should he have lumbered?
should we have lumbered?
should you have lumbered?
should they have lumbered? 	should I have been lumbering?
should you have been lumbering?
should he have been lumbering?
should we have been lumbering?
should you have been lumbering?
should they have been lumbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I lumber?
shouldn't you lumber?
shouldn't he lumber?
shouldn't we lumber?
shouldn't you lumber?
shouldn't they lumber? 	shouldn't I be lumbering?
shouldn't you be lumbering?
shouldn't he be lumbering?
shouldn't we be lumbering?
shouldn't you be lumbering?
shouldn't they be lumbering? 	shouldn't I have lumbered?
shouldn't you have lumbered?
shouldn't he have lumbered?
shouldn't we have lumbered?
shouldn't you have lumbered?
shouldn't they have lumbered? 	shouldn't I have been lumbering?
shouldn't you have been lumbering?
shouldn't he have been lumbering?
shouldn't we have been lumbering?
shouldn't you have been lumbering?
shouldn't they have been lumbering?