must solder
Regular verb: solder - soldered- soldered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must solder
you must solder
she must solder
we must solder
you must solder
they must solder 	I must be soldering
you must be soldering
she must be soldering
we must be soldering
you must be soldering
they must be soldering	I must have soldered
you must have soldered
she must have soldered
we must have soldered
you must have soldered
they must have soldered	I must have been soldering
you must have been soldering
she must have been soldering
we must have been soldering
you must have been soldering
they must have been soldering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't solder
you mustn't solder
she mustn't solder
we mustn't solder
you mustn't solder
they mustn't solder 	I mustn't be soldering
you mustn't be soldering
she mustn't be soldering
we mustn't be soldering
you mustn't be soldering
they mustn't be soldering	I mustn't have soldered
you mustn't have soldered
she mustn't have soldered
we mustn't have soldered
you mustn't have soldered
they mustn't have soldered	I mustn't have been soldering
you mustn't have been soldering
she mustn't have been soldering
we mustn't have been soldering
you mustn't have been soldering
they mustn't have been soldering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I solder?
must you solder?
must she solder?
must we solder?
must you solder?
must they solder? 	must I be soldering?
must you be soldering?
must she be soldering?
must we be soldering?
must you be soldering?
must they be soldering? 	must I have soldered?
must you have soldered?
must she have soldered?
must we have soldered?
must you have soldered?
must they have soldered? 	must I have been soldering?
must you have been soldering?
must she have been soldering?
must we have been soldering?
must you have been soldering?
must they have been soldering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I solder?
mustn't you solder?
mustn't she solder?
mustn't we solder?
mustn't you solder?
mustn't they solder? 	mustn't I be soldering?
mustn't you be soldering?
mustn't she be soldering?
mustn't we be soldering?
mustn't you be soldering?
mustn't they be soldering? 	mustn't I have soldered?
mustn't you have soldered?
mustn't she have soldered?
mustn't we have soldered?
mustn't you have soldered?
mustn't they have soldered? 	mustn't I have been soldering?
mustn't you have been soldering?
mustn't she have been soldering?
mustn't we have been soldering?
mustn't you have been soldering?
mustn't they have been soldering?