English verb conjugation
COULD DIP

Regular verb: dip - diped - diped

Affirmation

Simple form	V-ing form
I could dip you could dip he could dip we could dip you could dip they could dip	I could be diping you could be diping he could be diping we could be diping you could be diping they could be diping
Perfect	V-ing perfect
I could have diped you could have diped he could have diped we could have diped you could have diped they could have diped	I could have been diping you could have been diping he could have been diping we could have been diping you could have been diping they could have been diping

Negation

Simple form	V-ing form
I could not dip you could not dip he could not dip we could not dip you could not dip they could not dip	I could not be diping you could not be diping he could not be diping we could not be diping you could not be diping they could not be diping
Perfect	V-ing perfect
I could not have diped you could not have diped he could not have diped we could not have diped you could not have diped they could not have diped	I could not have been diping you could not have been diping he could not have been diping we could not have been diping you could not have been diping they could not have been diping

Interrogative form

Simple form	V-ing form
could I dip? could you dip? could he dip? could we dip? could you dip? could they dip?	could I be diping? could you be diping? could he be diping? could we be diping? could you be diping? could they be diping?
Perfect	V-ing perfect
could I have diped? could you have diped? could he have diped? could we have diped? could you have diped? could they have diped?	could I have been diping? could you have been diping? could he have been diping? could we have been diping? could you have been diping? could they have been diping?

Interro-negative form

Simple form	V-ing form
could I not dip? could you not dip? could he not dip? could we not dip? could you not dip? could they not dip?	could I not be diping? could you not be diping? could he not be diping? could we not be diping? could you not be diping? could they not be diping?
Perfect	V-ing perfect
could I not have diped? could you not have diped? could he not have diped? could we not have diped? could you not have diped? could they not have diped?	could I not have been diping? could you not have been diping? could he not have been diping? could we not have been diping? could you not have been diping? could they not have been diping?