must gloss
Regular verb: gloss - glossed- glossed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must gloss
you must gloss
she must gloss
we must gloss
you must gloss
they must gloss 	I must be glossing
you must be glossing
she must be glossing
we must be glossing
you must be glossing
they must be glossing	I must have glossed
you must have glossed
she must have glossed
we must have glossed
you must have glossed
they must have glossed	I must have been glossing
you must have been glossing
she must have been glossing
we must have been glossing
you must have been glossing
they must have been glossing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't gloss
you mustn't gloss
she mustn't gloss
we mustn't gloss
you mustn't gloss
they mustn't gloss 	I mustn't be glossing
you mustn't be glossing
she mustn't be glossing
we mustn't be glossing
you mustn't be glossing
they mustn't be glossing	I mustn't have glossed
you mustn't have glossed
she mustn't have glossed
we mustn't have glossed
you mustn't have glossed
they mustn't have glossed	I mustn't have been glossing
you mustn't have been glossing
she mustn't have been glossing
we mustn't have been glossing
you mustn't have been glossing
they mustn't have been glossing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I gloss?
must you gloss?
must she gloss?
must we gloss?
must you gloss?
must they gloss? 	must I be glossing?
must you be glossing?
must she be glossing?
must we be glossing?
must you be glossing?
must they be glossing? 	must I have glossed?
must you have glossed?
must she have glossed?
must we have glossed?
must you have glossed?
must they have glossed? 	must I have been glossing?
must you have been glossing?
must she have been glossing?
must we have been glossing?
must you have been glossing?
must they have been glossing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I gloss?
mustn't you gloss?
mustn't she gloss?
mustn't we gloss?
mustn't you gloss?
mustn't they gloss? 	mustn't I be glossing?
mustn't you be glossing?
mustn't she be glossing?
mustn't we be glossing?
mustn't you be glossing?
mustn't they be glossing? 	mustn't I have glossed?
mustn't you have glossed?
mustn't she have glossed?
mustn't we have glossed?
mustn't you have glossed?
mustn't they have glossed? 	mustn't I have been glossing?
mustn't you have been glossing?
mustn't she have been glossing?
mustn't we have been glossing?
mustn't you have been glossing?
mustn't they have been glossing?