could clang
Regular verb: clang - clanged- clanged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could clang
you could clang
he could clang
we could clang
you could clang
they could clang 	I could be clanging
you could be clanging
he could be clanging
we could be clanging
you could be clanging
they could be clanging	I could have clanged
you could have clanged
he could have clanged
we could have clanged
you could have clanged
they could have clanged	I could have been clanging
you could have been clanging
he could have been clanging
we could have been clanging
you could have been clanging
they could have been clanging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't clang
you couldn't clang
he couldn't clang
we couldn't clang
you couldn't clang
they couldn't clang 	I couldn't be clanging
you couldn't be clanging
he couldn't be clanging
we couldn't be clanging
you couldn't be clanging
they couldn't be clanging	I couldn't have clanged
you couldn't have clanged
he couldn't have clanged
we couldn't have clanged
you couldn't have clanged
they couldn't have clanged	I couldn't have been clanging
you couldn't have been clanging
he couldn't have been clanging
we couldn't have been clanging
you couldn't have been clanging
they couldn't have been clanging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I clang?
could you clang?
could he clang?
could we clang?
could you clang?
could they clang? 	could I be clanging?
could you be clanging?
could he be clanging?
could we be clanging?
could you be clanging?
could they be clanging? 	could I have clanged?
could you have clanged?
could he have clanged?
could we have clanged?
could you have clanged?
could they have clanged? 	could I have been clanging?
could you have been clanging?
could he have been clanging?
could we have been clanging?
could you have been clanging?
could they have been clanging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I clang?
couldn't you clang?
couldn't he clang?
couldn't we clang?
couldn't you clang?
couldn't they clang? 	couldn't I be clanging?
couldn't you be clanging?
couldn't he be clanging?
couldn't we be clanging?
couldn't you be clanging?
couldn't they be clanging? 	couldn't I have clanged?
couldn't you have clanged?
couldn't he have clanged?
couldn't we have clanged?
couldn't you have clanged?
couldn't they have clanged? 	couldn't I have been clanging?
couldn't you have been clanging?
couldn't he have been clanging?
couldn't we have been clanging?
couldn't you have been clanging?
couldn't they have been clanging?