I'd be flushing you'd be flushing he'd be flushing we'd be flushing you'd be flushing they'd be flushing
Perfect
I should've flushed you should've flushed he should've flushed we should've flushed you should've flushed they should've flushed
V-ing perfect
I should've been flushing you should've been flushing he should've been flushing we should've been flushing you should've been flushing they should've been flushing
Negation
Simple form
I shouldn't flush you shouldn't flush he shouldn't flush we shouldn't flush you shouldn't flush they shouldn't flush
V-ing form
I shouldn't be flushing you shouldn't be flushing he shouldn't be flushing we shouldn't be flushing you shouldn't be flushing they shouldn't be flushing
Perfect
I shouldn't have flushed you shouldn't have flushed he shouldn't have flushed we shouldn't have flushed you shouldn't have flushed they shouldn't have flushed
V-ing perfect
I shouldn't have been flushing you shouldn't have been flushing he shouldn't have been flushing we shouldn't have been flushing you shouldn't have been flushing they shouldn't 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
shouldn't I flush? shouldn't you flush? shouldn't he flush? shouldn't we flush? shouldn't you flush? shouldn't they flush?
V-ing form
shouldn't I be flushing? shouldn't you be flushing? shouldn't he be flushing? shouldn't we be flushing? shouldn't you be flushing? shouldn't they be flushing?
Perfect
shouldn't I have flushed? shouldn't you have flushed? shouldn't he have flushed? shouldn't we have flushed? shouldn't you have flushed? shouldn't they have flushed?
V-ing perfect
shouldn't I have been flushing? shouldn't you have been flushing? shouldn't he have been flushing? shouldn't we have been flushing? shouldn't you have been flushing? shouldn't they have been flushing?