English verb conjugation
COULD CLANG

Regular verb: clang - clanged - clanged

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I could not clang you could not clang he could not clang we could not clang you could not clang they could not clang	I could not be clanging you could not be clanging he could not be clanging we could not be clanging you could not be clanging they could not be clanging
Perfect	V-ing perfect
I could not have clanged you could not have clanged he could not have clanged we could not have clanged you could not have clanged they could not have clanged	I could not have been clanging you could not have been clanging he could not have been clanging we could not have been clanging you could not have been clanging they could not have been clanging

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
could I not clang? could you not clang? could he not clang? could we not clang? could you not clang? could they not clang?	could I not be clanging? could you not be clanging? could he not be clanging? could we not be clanging? could you not be clanging? could they not be clanging?
Perfect	V-ing perfect
could I not have clanged? could you not have clanged? could he not have clanged? could we not have clanged? could you not have clanged? could they not have clanged?	could I not have been clanging? could you not have been clanging? could he not have been clanging? could we not have been clanging? could you not have been clanging? could they not have been clanging?