I should unmask you should unmask she should unmask we should unmask you should unmask they should unmask
V-ing form
I should be unmasking you should be unmasking she should be unmasking we should be unmasking you should be unmasking they should be unmasking
Perfect
I should have unmasked you should have unmasked she should have unmasked we should have unmasked you should have unmasked they should have unmasked
V-ing perfect
I should have been unmasking you should have been unmasking she should have been unmasking we should have been unmasking you should have been unmasking they should have been unmasking
Negation
Simple form
I should not unmask you should not unmask she should not unmask we should not unmask you should not unmask they should not unmask
V-ing form
I should not be unmasking you should not be unmasking she should not be unmasking we should not be unmasking you should not be unmasking they should not be unmasking
Perfect
I should not have unmasked you should not have unmasked she should not have unmasked we should not have unmasked you should not have unmasked they should not have unmasked
V-ing perfect
I should not have been unmasking you should not have been unmasking she should not have been unmasking we should not have been unmasking you should not have been unmasking they should not have been unmasking
Interrogative form
Simple form
should I unmask? should you unmask? should she unmask? should we unmask? should you unmask? should they unmask?
V-ing form
should I be unmasking? should you be unmasking? should she be unmasking? should we be unmasking? should you be unmasking? should they be unmasking?
Perfect
should I have unmasked? should you have unmasked? should she have unmasked? should we have unmasked? should you have unmasked? should they have unmasked?
V-ing perfect
should I have been unmasking? should you have been unmasking? should she have been unmasking? should we have been unmasking? should you have been unmasking? should they have been unmasking?
Interro-negative form
Simple form
should I not unmask? should you not unmask? should she not unmask? should we not unmask? should you not unmask? should they not unmask?
V-ing form
should I not be unmasking? should you not be unmasking? should she not be unmasking? should we not be unmasking? should you not be unmasking? should they not be unmasking?
Perfect
should I not have unmasked? should you not have unmasked? should she not have unmasked? should we not have unmasked? should you not have unmasked? should they not have unmasked?
V-ing perfect
should I not have been unmasking? should you not have been unmasking? should she not have been unmasking? should we not have been unmasking? should you not have been unmasking? should they not have been unmasking?