I should flash you should flash he should flash we should flash you should flash they should flash
V-ing form
I should be flashing you should be flashing he should be flashing we should be flashing you should be flashing they should be flashing
Perfect
I should have flashed you should have flashed he should have flashed we should have flashed you should have flashed they should have flashed
V-ing perfect
I should have been flashing you should have been flashing he should have been flashing we should have been flashing you should have been flashing they should have been flashing
Negation
Simple form
I should not flash you should not flash he should not flash we should not flash you should not flash they should not flash
V-ing form
I should not be flashing you should not be flashing he should not be flashing we should not be flashing you should not be flashing they should not be flashing
Perfect
I should not have flashed you should not have flashed he should not have flashed we should not have flashed you should not have flashed they should not have flashed
V-ing perfect
I should not have been flashing you should not have been flashing he should not have been flashing we should not have been flashing you should not have been flashing they should not have been flashing
Interrogative form
Simple form
should I flash? should you flash? should he flash? should we flash? should you flash? should they flash?
V-ing form
should I be flashing? should you be flashing? should he be flashing? should we be flashing? should you be flashing? should they be flashing?
Perfect
should I have flashed? should you have flashed? should he have flashed? should we have flashed? should you have flashed? should they have flashed?
V-ing perfect
should I have been flashing? should you have been flashing? should he have been flashing? should we have been flashing? should you have been flashing? should they have been flashing?
Interro-negative form
Simple form
should I not flash? should you not flash? should he not flash? should we not flash? should you not flash? should they not flash?
V-ing form
should I not be flashing? should you not be flashing? should he not be flashing? should we not be flashing? should you not be flashing? should they not be flashing?
Perfect
should I not have flashed? should you not have flashed? should he not have flashed? should we not have flashed? should you not have flashed? should they not have flashed?
V-ing perfect
should I not have been flashing? should you not have been flashing? should he not have been flashing? should we not have been flashing? should you not have been flashing? should they not have been flashing?