could metal
Regular verb: metal - metalled- metalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could metal
you could metal
he could metal
we could metal
you could metal
they could metal 	I could be metalling
you could be metalling
he could be metalling
we could be metalling
you could be metalling
they could be metalling	I could have metalled
you could have metalled
he could have metalled
we could have metalled
you could have metalled
they could have metalled	I could have been metalling
you could have been metalling
he could have been metalling
we could have been metalling
you could have been metalling
they could have been metalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't metal
you couldn't metal
he couldn't metal
we couldn't metal
you couldn't metal
they couldn't metal 	I couldn't be metalling
you couldn't be metalling
he couldn't be metalling
we couldn't be metalling
you couldn't be metalling
they couldn't be metalling	I couldn't have metalled
you couldn't have metalled
he couldn't have metalled
we couldn't have metalled
you couldn't have metalled
they couldn't have metalled	I couldn't have been metalling
you couldn't have been metalling
he couldn't have been metalling
we couldn't have been metalling
you couldn't have been metalling
they couldn't have been metalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I metal?
could you metal?
could he metal?
could we metal?
could you metal?
could they metal? 	could I be metalling?
could you be metalling?
could he be metalling?
could we be metalling?
could you be metalling?
could they be metalling? 	could I have metalled?
could you have metalled?
could he have metalled?
could we have metalled?
could you have metalled?
could they have metalled? 	could I have been metalling?
could you have been metalling?
could he have been metalling?
could we have been metalling?
could you have been metalling?
could they have been metalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I metal?
couldn't you metal?
couldn't he metal?
couldn't we metal?
couldn't you metal?
couldn't they metal? 	couldn't I be metalling?
couldn't you be metalling?
couldn't he be metalling?
couldn't we be metalling?
couldn't you be metalling?
couldn't they be metalling? 	couldn't I have metalled?
couldn't you have metalled?
couldn't he have metalled?
couldn't we have metalled?
couldn't you have metalled?
couldn't they have metalled? 	couldn't I have been metalling?
couldn't you have been metalling?
couldn't he have been metalling?
couldn't we have been metalling?
couldn't you have been metalling?
couldn't they have been metalling?