must flush
Regular verb: flush - flushed- flushed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must flush
you must flush
she must flush
we must flush
you must flush
they must flush 	I must be flushing
you must be flushing
she must be flushing
we must be flushing
you must be flushing
they must be flushing	I must have flushed
you must have flushed
she must have flushed
we must have flushed
you must have flushed
they must have flushed	I must have been flushing
you must have been flushing
she must have been flushing
we must have been flushing
you must have been flushing
they must have been flushing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't flush
you mustn't flush
she mustn't flush
we mustn't flush
you mustn't flush
they mustn't flush 	I mustn't be flushing
you mustn't be flushing
she mustn't be flushing
we mustn't be flushing
you mustn't be flushing
they mustn't be flushing	I mustn't have flushed
you mustn't have flushed
she mustn't have flushed
we mustn't have flushed
you mustn't have flushed
they mustn't have flushed	I mustn't have been flushing
you mustn't have been flushing
she mustn't have been flushing
we mustn't have been flushing
you mustn't have been flushing
they mustn't have been flushing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I flush?
must you flush?
must she flush?
must we flush?
must you flush?
must they flush? 	must I be flushing?
must you be flushing?
must she be flushing?
must we be flushing?
must you be flushing?
must they be flushing? 	must I have flushed?
must you have flushed?
must she have flushed?
must we have flushed?
must you have flushed?
must they have flushed? 	must I have been flushing?
must you have been flushing?
must she have been flushing?
must we have been flushing?
must you have been flushing?
must they have been flushing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I flush?
mustn't you flush?
mustn't she flush?
mustn't we flush?
mustn't you flush?
mustn't they flush? 	mustn't I be flushing?
mustn't you be flushing?
mustn't she be flushing?
mustn't we be flushing?
mustn't you be flushing?
mustn't they be flushing? 	mustn't I have flushed?
mustn't you have flushed?
mustn't she have flushed?
mustn't we have flushed?
mustn't you have flushed?
mustn't they have flushed? 	mustn't I have been flushing?
mustn't you have been flushing?
mustn't she have been flushing?
mustn't we have been flushing?
mustn't you have been flushing?
mustn't they have been flushing?