English verb conjugation
COULD UPSISE

Regular verb: upsise - upsised - upsised

Affirmation

Simple form	V-ing form
I could upsise you could upsise she could upsise we could upsise you could upsise they could upsise	I could be upsising you could be upsising she could be upsising we could be upsising you could be upsising they could be upsising
Perfect	V-ing perfect
I could have upsised you could have upsised she could have upsised we could have upsised you could have upsised they could have upsised	I could have been upsising you could have been upsising she could have been upsising we could have been upsising you could have been upsising they could have been upsising

Negation

Simple form	V-ing form
I couldn't upsise you couldn't upsise she couldn't upsise we couldn't upsise you couldn't upsise they couldn't upsise	I couldn't be upsising you couldn't be upsising she couldn't be upsising we couldn't be upsising you couldn't be upsising they couldn't be upsising
Perfect	V-ing perfect
I couldn't have upsised you couldn't have upsised she couldn't have upsised we couldn't have upsised you couldn't have upsised they couldn't have upsised	I couldn't have been upsising you couldn't have been upsising she couldn't have been upsising we couldn't have been upsising you couldn't have been upsising they couldn't have been upsising

Interrogative form

Simple form	V-ing form
could I upsise? could you upsise? could she upsise? could we upsise? could you upsise? could they upsise?	could I be upsising? could you be upsising? could she be upsising? could we be upsising? could you be upsising? could they be upsising?
Perfect	V-ing perfect
could I have upsised? could you have upsised? could she have upsised? could we have upsised? could you have upsised? could they have upsised?	could I have been upsising? could you have been upsising? could she have been upsising? could we have been upsising? could you have been upsising? could they have been upsising?

Interro-negative form

Simple form	V-ing form
couldn't I upsise? couldn't you upsise? couldn't she upsise? couldn't we upsise? couldn't you upsise? couldn't they upsise?	couldn't I be upsising? couldn't you be upsising? couldn't she be upsising? couldn't we be upsising? couldn't you be upsising? couldn't they be upsising?
Perfect	V-ing perfect
couldn't I have upsised? couldn't you have upsised? couldn't she have upsised? couldn't we have upsised? couldn't you have upsised? couldn't they have upsised?	couldn't I have been upsising? couldn't you have been upsising? couldn't she have been upsising? couldn't we have been upsising? couldn't you have been upsising? couldn't they have been upsising?