could melt
Regular verb: melt - melted- melted

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't melt
you couldn't melt
she couldn't melt
we couldn't melt
you couldn't melt
they couldn't melt 	I couldn't be melting
you couldn't be melting
she couldn't be melting
we couldn't be melting
you couldn't be melting
they couldn't be melting	I couldn't have melted
you couldn't have melted
she couldn't have melted
we couldn't have melted
you couldn't have melted
they couldn't have melted	I couldn't have been melting
you couldn't have been melting
she couldn't have been melting
we couldn't have been melting
you couldn't have been melting
they couldn't have been melting	

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

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