should double-check
Regular verb: double-check - double-checked- double-checked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should double-check
you should double-check
she should double-check
we should double-check
you should double-check
they should double-check 	I should be double-checking
you should be double-checking
she should be double-checking
we should be double-checking
you should be double-checking
they should be double-checking	I should have double-checked
you should have double-checked
she should have double-checked
we should have double-checked
you should have double-checked
they should have double-checked	I should have been double-checking
you should have been double-checking
she should have been double-checking
we should have been double-checking
you should have been double-checking
they should have been double-checking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not double-check
you should not double-check
she should not double-check
we should not double-check
you should not double-check
they should not double-check 	I should not be double-checking
you should not be double-checking
she should not be double-checking
we should not be double-checking
you should not be double-checking
they should not be double-checking	I should not have double-checked
you should not have double-checked
she should not have double-checked
we should not have double-checked
you should not have double-checked
they should not have double-checked	I should not have been double-checking
you should not have been double-checking
she should not have been double-checking
we should not have been double-checking
you should not have been double-checking
they should not have been double-checking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I double-check?
should you double-check?
should she double-check?
should we double-check?
should you double-check?
should they double-check? 	should I be double-checking?
should you be double-checking?
should she be double-checking?
should we be double-checking?
should you be double-checking?
should they be double-checking? 	should I have double-checked?
should you have double-checked?
should she have double-checked?
should we have double-checked?
should you have double-checked?
should they have double-checked? 	should I have been double-checking?
should you have been double-checking?
should she have been double-checking?
should we have been double-checking?
should you have been double-checking?
should they have been double-checking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not double-check?
should you not double-check?
should she not double-check?
should we not double-check?
should you not double-check?
should they not double-check? 	should I not be double-checking?
should you not be double-checking?
should she not be double-checking?
should we not be double-checking?
should you not be double-checking?
should they not be double-checking? 	should I not have double-checked?
should you not have double-checked?
should she not have double-checked?
should we not have double-checked?
should you not have double-checked?
should they not have double-checked? 	should I not have been double-checking?
should you not have been double-checking?
should she not have been double-checking?
should we not have been double-checking?
should you not have been double-checking?
should they not have been double-checking?