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 couldn't zone you couldn't zone he couldn't zone we couldn't zone you couldn't zone they couldn't zone	I couldn't be zoning you couldn't be zoning he couldn't be zoning we couldn't be zoning you couldn't be zoning they couldn't be zoning
Perfect	V-ing perfect
I couldn't have zoned you couldn't have zoned he couldn't have zoned we couldn't have zoned you couldn't have zoned they couldn't have zoned	I couldn't have been zoning you couldn't have been zoning he couldn't have been zoning we couldn't have been zoning you couldn't have been zoning they couldn't 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
couldn't I zone? couldn't you zone? couldn't he zone? couldn't we zone? couldn't you zone? couldn't they zone?	couldn't I be zoning? couldn't you be zoning? couldn't he be zoning? couldn't we be zoning? couldn't you be zoning? couldn't they be zoning?
Perfect	V-ing perfect
couldn't I have zoned? couldn't you have zoned? couldn't he have zoned? couldn't we have zoned? couldn't you have zoned? couldn't they have zoned?	couldn't I have been zoning? couldn't you have been zoning? couldn't he have been zoning? couldn't we have been zoning? couldn't you have been zoning? couldn't they have been zoning?