must suss
Regular verb: suss - sussed- sussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must suss
you must suss
he must suss
we must suss
you must suss
they must suss 	I must be sussing
you must be sussing
he must be sussing
we must be sussing
you must be sussing
they must be sussing	I must have sussed
you must have sussed
he 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
he 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 must not suss
you must not suss
he must not suss
we must not suss
you must not suss
they must not suss 	I must not be sussing
you must not be sussing
he must not be sussing
we must not be sussing
you must not be sussing
they must not be sussing	I must not have sussed
you must not have sussed
he must not have sussed
we must not have sussed
you must not have sussed
they must not have sussed	I must not have been sussing
you must not have been sussing
he must not have been sussing
we must not have been sussing
you must not have been sussing
they must not have been sussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I suss?
must you suss?
must he suss?
must we suss?
must you suss?
must they suss? 	must I be sussing?
must you be sussing?
must he be sussing?
must we be sussing?
must you be sussing?
must they be sussing? 	must I have sussed?
must you have sussed?
must he 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 he 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 	
must I not suss?
must you not suss?
must he not suss?
must we not suss?
must you not suss?
must they not suss? 	must I not be sussing?
must you not be sussing?
must he not be sussing?
must we not be sussing?
must you not be sussing?
must they not be sussing? 	must I not have sussed?
must you not have sussed?
must he not have sussed?
must we not have sussed?
must you not have sussed?
must they not have sussed? 	must I not have been sussing?
must you not have been sussing?
must he not have been sussing?
must we not have been sussing?
must you not have been sussing?
must they not have been sussing?