must melt
Regular verb: melt - melted- melted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must melt
you must melt
she must melt
we must melt
you must melt
they must melt 	I must be melting
you must be melting
she must be melting
we must be melting
you must be melting
they must be melting	I must have melted
you must have melted
she must have melted
we must have melted
you must have melted
they must have melted	I must have been melting
you must have been melting
she must have been melting
we must have been melting
you must have been melting
they must have been melting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not melt
you must not melt
she must not melt
we must not melt
you must not melt
they must not melt 	I must not be melting
you must not be melting
she must not be melting
we must not be melting
you must not be melting
they must not be melting	I must not have melted
you must not have melted
she must not have melted
we must not have melted
you must not have melted
they must not have melted	I must not have been melting
you must not have been melting
she must not have been melting
we must not have been melting
you must not have been melting
they must not have been melting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I melt?
must you melt?
must she melt?
must we melt?
must you melt?
must they melt? 	must I be melting?
must you be melting?
must she be melting?
must we be melting?
must you be melting?
must they be melting? 	must I have melted?
must you have melted?
must she have melted?
must we have melted?
must you have melted?
must they have melted? 	must I have been melting?
must you have been melting?
must she have been melting?
must we have been melting?
must you have been melting?
must they have been melting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not melt?
must you not melt?
must she not melt?
must we not melt?
must you not melt?
must they not melt? 	must I not be melting?
must you not be melting?
must she not be melting?
must we not be melting?
must you not be melting?
must they not be melting? 	must I not have melted?
must you not have melted?
must she not have melted?
must we not have melted?
must you not have melted?
must they not have melted? 	must I not have been melting?
must you not have been melting?
must she not have been melting?
must we not have been melting?
must you not have been melting?
must they not have been melting?