English verb conjugation
COULD ZONE

Regular verb: zone - zoned - zoned

Affirmation

Simple form	V-ing form
I could zone you could zone he could zone we could zone you could zone they could zone	I could be zoning you could be zoning he could be zoning we could be zoning you could be zoning they could be zoning
Perfect	V-ing perfect
I could have zoned you could have zoned he could have zoned we could have zoned you could have zoned they could have zoned	I could have been zoning you could have been zoning he could have been zoning we could have been zoning you could have been zoning they could have been zoning

Negation

Simple form	V-ing form
I could not zone you could not zone he could not zone we could not zone you could not zone they could not zone	I could not be zoning you could not be zoning he could not be zoning we could not be zoning you could not be zoning they could not be zoning
Perfect	V-ing perfect
I could not have zoned you could not have zoned he could not have zoned we could not have zoned you could not have zoned they could not have zoned	I could not have been zoning you could not have been zoning he could not have been zoning we could not have been zoning you could not have been zoning they could not have been zoning

Interrogative form

Simple form	V-ing form
could I zone? could you zone? could he zone? could we zone? could you zone? could they zone?	could I be zoning? could you be zoning? could he be zoning? could we be zoning? could you be zoning? could they be zoning?
Perfect	V-ing perfect
could I have zoned? could you have zoned? could he have zoned? could we have zoned? could you have zoned? could they have zoned?	could I have been zoning? could you have been zoning? could he have been zoning? could we have been zoning? could you have been zoning? could they have been zoning?

Interro-negative form

Simple form	V-ing form
could I not zone? could you not zone? could he not zone? could we not zone? could you not zone? could they not zone?	could I not be zoning? could you not be zoning? could he not be zoning? could we not be zoning? could you not be zoning? could they not be zoning?
Perfect	V-ing perfect
could I not have zoned? could you not have zoned? could he not have zoned? could we not have zoned? could you not have zoned? could they not have zoned?	could I not have been zoning? could you not have been zoning? could he not have been zoning? could we not have been zoning? could you not have been zoning? could they not have been zoning?