should precheck
Regular verb: precheck - prechecked- prechecked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd precheck
you'd precheck
he'd precheck
we'd precheck
you'd precheck
they'd precheck 	I'd be prechecking
you'd be prechecking
he'd be prechecking
we'd be prechecking
you'd be prechecking
they'd be prechecking	I should've prechecked
you should've prechecked
he should've prechecked
we should've prechecked
you should've prechecked
they should've prechecked	I should've been prechecking
you should've been prechecking
he should've been prechecking
we should've been prechecking
you should've been prechecking
they should've been prechecking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't precheck
you shouldn't precheck
he shouldn't precheck
we shouldn't precheck
you shouldn't precheck
they shouldn't precheck 	I shouldn't be prechecking
you shouldn't be prechecking
he shouldn't be prechecking
we shouldn't be prechecking
you shouldn't be prechecking
they shouldn't be prechecking	I shouldn't have prechecked
you shouldn't have prechecked
he shouldn't have prechecked
we shouldn't have prechecked
you shouldn't have prechecked
they shouldn't have prechecked	I shouldn't have been prechecking
you shouldn't have been prechecking
he shouldn't have been prechecking
we shouldn't have been prechecking
you shouldn't have been prechecking
they shouldn't have been prechecking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I precheck?
should you precheck?
should he precheck?
should we precheck?
should you precheck?
should they precheck? 	should I be prechecking?
should you be prechecking?
should he be prechecking?
should we be prechecking?
should you be prechecking?
should they be prechecking? 	should I have prechecked?
should you have prechecked?
should he have prechecked?
should we have prechecked?
should you have prechecked?
should they have prechecked? 	should I have been prechecking?
should you have been prechecking?
should he have been prechecking?
should we have been prechecking?
should you have been prechecking?
should they have been prechecking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I precheck?
shouldn't you precheck?
shouldn't he precheck?
shouldn't we precheck?
shouldn't you precheck?
shouldn't they precheck? 	shouldn't I be prechecking?
shouldn't you be prechecking?
shouldn't he be prechecking?
shouldn't we be prechecking?
shouldn't you be prechecking?
shouldn't they be prechecking? 	shouldn't I have prechecked?
shouldn't you have prechecked?
shouldn't he have prechecked?
shouldn't we have prechecked?
shouldn't you have prechecked?
shouldn't they have prechecked? 	shouldn't I have been prechecking?
shouldn't you have been prechecking?
shouldn't he have been prechecking?
shouldn't we have been prechecking?
shouldn't you have been prechecking?
shouldn't they have been prechecking?