English verb conjugation
COULD UPSIZE

Regular verb: upsize - upsized - upsized

Affirmation

Simple form	V-ing form
I could upsize you could upsize she could upsize we could upsize you could upsize they could upsize	I could be upsizing you could be upsizing she could be upsizing we could be upsizing you could be upsizing they could be upsizing
Perfect	V-ing perfect
I could have upsized you could have upsized she could have upsized we could have upsized you could have upsized they could have upsized	I could have been upsizing you could have been upsizing she could have been upsizing we could have been upsizing you could have been upsizing they could have been upsizing

Negation

Simple form	V-ing form
I couldn't upsize you couldn't upsize she couldn't upsize we couldn't upsize you couldn't upsize they couldn't upsize	I couldn't be upsizing you couldn't be upsizing she couldn't be upsizing we couldn't be upsizing you couldn't be upsizing they couldn't be upsizing
Perfect	V-ing perfect
I couldn't have upsized you couldn't have upsized she couldn't have upsized we couldn't have upsized you couldn't have upsized they couldn't have upsized	I couldn't have been upsizing you couldn't have been upsizing she couldn't have been upsizing we couldn't have been upsizing you couldn't have been upsizing they couldn't have been upsizing

Interrogative form

Simple form	V-ing form
could I upsize? could you upsize? could she upsize? could we upsize? could you upsize? could they upsize?	could I be upsizing? could you be upsizing? could she be upsizing? could we be upsizing? could you be upsizing? could they be upsizing?
Perfect	V-ing perfect
could I have upsized? could you have upsized? could she have upsized? could we have upsized? could you have upsized? could they have upsized?	could I have been upsizing? could you have been upsizing? could she have been upsizing? could we have been upsizing? could you have been upsizing? could they have been upsizing?

Interro-negative form

Simple form	V-ing form
couldn't I upsize? couldn't you upsize? couldn't she upsize? couldn't we upsize? couldn't you upsize? couldn't they upsize?	couldn't I be upsizing? couldn't you be upsizing? couldn't she be upsizing? couldn't we be upsizing? couldn't you be upsizing? couldn't they be upsizing?
Perfect	V-ing perfect
couldn't I have upsized? couldn't you have upsized? couldn't she have upsized? couldn't we have upsized? couldn't you have upsized? couldn't they have upsized?	couldn't I have been upsizing? couldn't you have been upsizing? couldn't she have been upsizing? couldn't we have been upsizing? couldn't you have been upsizing? couldn't they have been upsizing?