I should flap you should flap she should flap we should flap you should flap they should flap
V-ing form
I should be flapping you should be flapping she should be flapping we should be flapping you should be flapping they should be flapping
Perfect
I should have flapped you should have flapped she should have flapped we should have flapped you should have flapped they should have flapped
V-ing perfect
I should have been flapping you should have been flapping she should have been flapping we should have been flapping you should have been flapping they should have been flapping
Negation
Simple form
I should not flap you should not flap she should not flap we should not flap you should not flap they should not flap
V-ing form
I should not be flapping you should not be flapping she should not be flapping we should not be flapping you should not be flapping they should not be flapping
Perfect
I should not have flapped you should not have flapped she should not have flapped we should not have flapped you should not have flapped they should not have flapped
V-ing perfect
I should not have been flapping you should not have been flapping she should not have been flapping we should not have been flapping you should not have been flapping they should not have been flapping
Interrogative form
Simple form
should I flap? should you flap? should she flap? should we flap? should you flap? should they flap?
V-ing form
should I be flapping? should you be flapping? should she be flapping? should we be flapping? should you be flapping? should they be flapping?
Perfect
should I have flapped? should you have flapped? should she have flapped? should we have flapped? should you have flapped? should they have flapped?
V-ing perfect
should I have been flapping? should you have been flapping? should she have been flapping? should we have been flapping? should you have been flapping? should they have been flapping?
Interro-negative form
Simple form
should I not flap? should you not flap? should she not flap? should we not flap? should you not flap? should they not flap?
V-ing form
should I not be flapping? should you not be flapping? should she not be flapping? should we not be flapping? should you not be flapping? should they not be flapping?
Perfect
should I not have flapped? should you not have flapped? should she not have flapped? should we not have flapped? should you not have flapped? should they not have flapped?
V-ing perfect
should I not have been flapping? should you not have been flapping? should she not have been flapping? should we not have been flapping? should you not have been flapping? should they not have been flapping?