should clerk
Regular verb: clerk - clerked- clerked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd clerk
you'd clerk
he'd clerk
we'd clerk
you'd clerk
they'd clerk 	I'd be clerking
you'd be clerking
he'd be clerking
we'd be clerking
you'd be clerking
they'd be clerking	I should've clerked
you should've clerked
he should've clerked
we should've clerked
you should've clerked
they should've clerked	I should've been clerking
you should've been clerking
he should've been clerking
we should've been clerking
you should've been clerking
they should've been clerking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't clerk
you shouldn't clerk
he shouldn't clerk
we shouldn't clerk
you shouldn't clerk
they shouldn't clerk 	I shouldn't be clerking
you shouldn't be clerking
he shouldn't be clerking
we shouldn't be clerking
you shouldn't be clerking
they shouldn't be clerking	I shouldn't have clerked
you shouldn't have clerked
he shouldn't have clerked
we shouldn't have clerked
you shouldn't have clerked
they shouldn't have clerked	I shouldn't have been clerking
you shouldn't have been clerking
he shouldn't have been clerking
we shouldn't have been clerking
you shouldn't have been clerking
they shouldn't have been clerking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I clerk?
should you clerk?
should he clerk?
should we clerk?
should you clerk?
should they clerk? 	should I be clerking?
should you be clerking?
should he be clerking?
should we be clerking?
should you be clerking?
should they be clerking? 	should I have clerked?
should you have clerked?
should he have clerked?
should we have clerked?
should you have clerked?
should they have clerked? 	should I have been clerking?
should you have been clerking?
should he have been clerking?
should we have been clerking?
should you have been clerking?
should they have been clerking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I clerk?
shouldn't you clerk?
shouldn't he clerk?
shouldn't we clerk?
shouldn't you clerk?
shouldn't they clerk? 	shouldn't I be clerking?
shouldn't you be clerking?
shouldn't he be clerking?
shouldn't we be clerking?
shouldn't you be clerking?
shouldn't they be clerking? 	shouldn't I have clerked?
shouldn't you have clerked?
shouldn't he have clerked?
shouldn't we have clerked?
shouldn't you have clerked?
shouldn't they have clerked? 	shouldn't I have been clerking?
shouldn't you have been clerking?
shouldn't he have been clerking?
shouldn't we have been clerking?
shouldn't you have been clerking?
shouldn't they have been clerking?