should countersink
Irregular verb: countersink - countersank- countersunk

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd countersink
you'd countersink
he'd countersink
we'd countersink
you'd countersink
they'd countersink 	I'd be countersinking
you'd be countersinking
he'd be countersinking
we'd be countersinking
you'd be countersinking
they'd be countersinking	I should've countersunk
you should've countersunk
he should've countersunk
we should've countersunk
you should've countersunk
they should've countersunk	I should've been countersinking
you should've been countersinking
he should've been countersinking
we should've been countersinking
you should've been countersinking
they should've been countersinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't countersink
you shouldn't countersink
he shouldn't countersink
we shouldn't countersink
you shouldn't countersink
they shouldn't countersink 	I shouldn't be countersinking
you shouldn't be countersinking
he shouldn't be countersinking
we shouldn't be countersinking
you shouldn't be countersinking
they shouldn't be countersinking	I shouldn't have countersunk
you shouldn't have countersunk
he shouldn't have countersunk
we shouldn't have countersunk
you shouldn't have countersunk
they shouldn't have countersunk	I shouldn't have been countersinking
you shouldn't have been countersinking
he shouldn't have been countersinking
we shouldn't have been countersinking
you shouldn't have been countersinking
they shouldn't have been countersinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I countersink?
should you countersink?
should he countersink?
should we countersink?
should you countersink?
should they countersink? 	should I be countersinking?
should you be countersinking?
should he be countersinking?
should we be countersinking?
should you be countersinking?
should they be countersinking? 	should I have countersunk?
should you have countersunk?
should he have countersunk?
should we have countersunk?
should you have countersunk?
should they have countersunk? 	should I have been countersinking?
should you have been countersinking?
should he have been countersinking?
should we have been countersinking?
should you have been countersinking?
should they have been countersinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I countersink?
shouldn't you countersink?
shouldn't he countersink?
shouldn't we countersink?
shouldn't you countersink?
shouldn't they countersink? 	shouldn't I be countersinking?
shouldn't you be countersinking?
shouldn't he be countersinking?
shouldn't we be countersinking?
shouldn't you be countersinking?
shouldn't they be countersinking? 	shouldn't I have countersunk?
shouldn't you have countersunk?
shouldn't he have countersunk?
shouldn't we have countersunk?
shouldn't you have countersunk?
shouldn't they have countersunk? 	shouldn't I have been countersinking?
shouldn't you have been countersinking?
shouldn't he have been countersinking?
shouldn't we have been countersinking?
shouldn't you have been countersinking?
shouldn't they have been countersinking?