must suss
Regular verb: suss - sussed- sussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must suss
you must suss
she must suss
we must suss
you must suss
they must suss 	I must be sussing
you must be sussing
she must be sussing
we must be sussing
you must be sussing
they must be sussing	I must have sussed
you must have sussed
she must have sussed
we must have sussed
you must have sussed
they must have sussed	I must have been sussing
you must have been sussing
she must have been sussing
we must have been sussing
you must have been sussing
they must have been sussing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't suss
you mustn't suss
she mustn't suss
we mustn't suss
you mustn't suss
they mustn't suss 	I mustn't be sussing
you mustn't be sussing
she mustn't be sussing
we mustn't be sussing
you mustn't be sussing
they mustn't be sussing	I mustn't have sussed
you mustn't have sussed
she mustn't have sussed
we mustn't have sussed
you mustn't have sussed
they mustn't have sussed	I mustn't have been sussing
you mustn't have been sussing
she mustn't have been sussing
we mustn't have been sussing
you mustn't have been sussing
they mustn't have been sussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I suss?
must you suss?
must she suss?
must we suss?
must you suss?
must they suss? 	must I be sussing?
must you be sussing?
must she be sussing?
must we be sussing?
must you be sussing?
must they be sussing? 	must I have sussed?
must you have sussed?
must she have sussed?
must we have sussed?
must you have sussed?
must they have sussed? 	must I have been sussing?
must you have been sussing?
must she have been sussing?
must we have been sussing?
must you have been sussing?
must they have been sussing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I suss?
mustn't you suss?
mustn't she suss?
mustn't we suss?
mustn't you suss?
mustn't they suss? 	mustn't I be sussing?
mustn't you be sussing?
mustn't she be sussing?
mustn't we be sussing?
mustn't you be sussing?
mustn't they be sussing? 	mustn't I have sussed?
mustn't you have sussed?
mustn't she have sussed?
mustn't we have sussed?
mustn't you have sussed?
mustn't they have sussed? 	mustn't I have been sussing?
mustn't you have been sussing?
mustn't she have been sussing?
mustn't we have been sussing?
mustn't you have been sussing?
mustn't they have been sussing?