English verb conjugation
COULD CLUE

Regular verb: clue - clued - clued

Affirmation

Simple form	V-ing form
I could clue you could clue he could clue we could clue you could clue they could clue	I could be cluing you could be cluing he could be cluing we could be cluing you could be cluing they could be cluing
Perfect	V-ing perfect
I could have clued you could have clued he could have clued we could have clued you could have clued they could have clued	I could have been cluing you could have been cluing he could have been cluing we could have been cluing you could have been cluing they could have been cluing

Negation

Simple form	V-ing form
I could not clue you could not clue he could not clue we could not clue you could not clue they could not clue	I could not be cluing you could not be cluing he could not be cluing we could not be cluing you could not be cluing they could not be cluing
Perfect	V-ing perfect
I could not have clued you could not have clued he could not have clued we could not have clued you could not have clued they could not have clued	I could not have been cluing you could not have been cluing he could not have been cluing we could not have been cluing you could not have been cluing they could not have been cluing

Interrogative form

Simple form	V-ing form
could I clue? could you clue? could he clue? could we clue? could you clue? could they clue?	could I be cluing? could you be cluing? could he be cluing? could we be cluing? could you be cluing? could they be cluing?
Perfect	V-ing perfect
could I have clued? could you have clued? could he have clued? could we have clued? could you have clued? could they have clued?	could I have been cluing? could you have been cluing? could he have been cluing? could we have been cluing? could you have been cluing? could they have been cluing?

Interro-negative form

Simple form	V-ing form
could I not clue? could you not clue? could he not clue? could we not clue? could you not clue? could they not clue?	could I not be cluing? could you not be cluing? could he not be cluing? could we not be cluing? could you not be cluing? could they not be cluing?
Perfect	V-ing perfect
could I not have clued? could you not have clued? could he not have clued? could we not have clued? could you not have clued? could they not have clued?	could I not have been cluing? could you not have been cluing? could he not have been cluing? could we not have been cluing? could you not have been cluing? could they not have been cluing?