I should flush you should flush he should flush we should flush you should flush they should flush
V-ing form
I should be flushing you should be flushing he should be flushing we should be flushing you should be flushing they should be flushing
Perfect
I should have flushed you should have flushed he should have flushed we should have flushed you should have flushed they should have flushed
V-ing perfect
I should have been flushing you should have been flushing he should have been flushing we should have been flushing you should have been flushing they should have been flushing
Negation
Simple form
I should not flush you should not flush he should not flush we should not flush you should not flush they should not flush
V-ing form
I should not be flushing you should not be flushing he should not be flushing we should not be flushing you should not be flushing they should not be flushing
Perfect
I should not have flushed you should not have flushed he should not have flushed we should not have flushed you should not have flushed they should not have flushed
V-ing perfect
I should not have been flushing you should not have been flushing he should not have been flushing we should not have been flushing you should not have been flushing they should not have been flushing
Interrogative form
Simple form
should I flush? should you flush? should he flush? should we flush? should you flush? should they flush?
V-ing form
should I be flushing? should you be flushing? should he be flushing? should we be flushing? should you be flushing? should they be flushing?
Perfect
should I have flushed? should you have flushed? should he have flushed? should we have flushed? should you have flushed? should they have flushed?
V-ing perfect
should I have been flushing? should you have been flushing? should he have been flushing? should we have been flushing? should you have been flushing? should they have been flushing?
Interro-negative form
Simple form
should I not flush? should you not flush? should he not flush? should we not flush? should you not flush? should they not flush?
V-ing form
should I not be flushing? should you not be flushing? should he not be flushing? should we not be flushing? should you not be flushing? should they not be flushing?
Perfect
should I not have flushed? should you not have flushed? should he not have flushed? should we not have flushed? should you not have flushed? should they not have flushed?
V-ing perfect
should I not have been flushing? should you not have been flushing? should he not have been flushing? should we not have been flushing? should you not have been flushing? should they not have been flushing?