must blush
Regular verb: blush - blushed- blushed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must blush
you must blush
she must blush
we must blush
you must blush
they must blush 	I must be blushing
you must be blushing
she must be blushing
we must be blushing
you must be blushing
they must be blushing	I must have blushed
you must have blushed
she must have blushed
we must have blushed
you must have blushed
they must have blushed	I must have been blushing
you must have been blushing
she must have been blushing
we must have been blushing
you must have been blushing
they must have been blushing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't blush
you mustn't blush
she mustn't blush
we mustn't blush
you mustn't blush
they mustn't blush 	I mustn't be blushing
you mustn't be blushing
she mustn't be blushing
we mustn't be blushing
you mustn't be blushing
they mustn't be blushing	I mustn't have blushed
you mustn't have blushed
she mustn't have blushed
we mustn't have blushed
you mustn't have blushed
they mustn't have blushed	I mustn't have been blushing
you mustn't have been blushing
she mustn't have been blushing
we mustn't have been blushing
you mustn't have been blushing
they mustn't have been blushing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I blush?
must you blush?
must she blush?
must we blush?
must you blush?
must they blush? 	must I be blushing?
must you be blushing?
must she be blushing?
must we be blushing?
must you be blushing?
must they be blushing? 	must I have blushed?
must you have blushed?
must she have blushed?
must we have blushed?
must you have blushed?
must they have blushed? 	must I have been blushing?
must you have been blushing?
must she have been blushing?
must we have been blushing?
must you have been blushing?
must they have been blushing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I blush?
mustn't you blush?
mustn't she blush?
mustn't we blush?
mustn't you blush?
mustn't they blush? 	mustn't I be blushing?
mustn't you be blushing?
mustn't she be blushing?
mustn't we be blushing?
mustn't you be blushing?
mustn't they be blushing? 	mustn't I have blushed?
mustn't you have blushed?
mustn't she have blushed?
mustn't we have blushed?
mustn't you have blushed?
mustn't they have blushed? 	mustn't I have been blushing?
mustn't you have been blushing?
mustn't she have been blushing?
mustn't we have been blushing?
mustn't you have been blushing?
mustn't they have been blushing?