must seam
Regular verb: seam - seamed- seamed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must seam
you must seam
she must seam
we must seam
you must seam
they must seam 	I must be seaming
you must be seaming
she must be seaming
we must be seaming
you must be seaming
they must be seaming	I must have seamed
you must have seamed
she must have seamed
we must have seamed
you must have seamed
they must have seamed	I must have been seaming
you must have been seaming
she must have been seaming
we must have been seaming
you must have been seaming
they must have been seaming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't seam
you mustn't seam
she mustn't seam
we mustn't seam
you mustn't seam
they mustn't seam 	I mustn't be seaming
you mustn't be seaming
she mustn't be seaming
we mustn't be seaming
you mustn't be seaming
they mustn't be seaming	I mustn't have seamed
you mustn't have seamed
she mustn't have seamed
we mustn't have seamed
you mustn't have seamed
they mustn't have seamed	I mustn't have been seaming
you mustn't have been seaming
she mustn't have been seaming
we mustn't have been seaming
you mustn't have been seaming
they mustn't have been seaming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I seam?
must you seam?
must she seam?
must we seam?
must you seam?
must they seam? 	must I be seaming?
must you be seaming?
must she be seaming?
must we be seaming?
must you be seaming?
must they be seaming? 	must I have seamed?
must you have seamed?
must she have seamed?
must we have seamed?
must you have seamed?
must they have seamed? 	must I have been seaming?
must you have been seaming?
must she have been seaming?
must we have been seaming?
must you have been seaming?
must they have been seaming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I seam?
mustn't you seam?
mustn't she seam?
mustn't we seam?
mustn't you seam?
mustn't they seam? 	mustn't I be seaming?
mustn't you be seaming?
mustn't she be seaming?
mustn't we be seaming?
mustn't you be seaming?
mustn't they be seaming? 	mustn't I have seamed?
mustn't you have seamed?
mustn't she have seamed?
mustn't we have seamed?
mustn't you have seamed?
mustn't they have seamed? 	mustn't I have been seaming?
mustn't you have been seaming?
mustn't she have been seaming?
mustn't we have been seaming?
mustn't you have been seaming?
mustn't they have been seaming?