English verb conjugation
COULD UM

Regular verb: um - umed - umed

Affirmation

Simple form	V-ing form
I could um you could um he could um we could um you could um they could um	I could be uming you could be uming he could be uming we could be uming you could be uming they could be uming
Perfect	V-ing perfect
I could have umed you could have umed he could have umed we could have umed you could have umed they could have umed	I could have been uming you could have been uming he could have been uming we could have been uming you could have been uming they could have been uming

Negation

Simple form	V-ing form
I couldn't um you couldn't um he couldn't um we couldn't um you couldn't um they couldn't um	I couldn't be uming you couldn't be uming he couldn't be uming we couldn't be uming you couldn't be uming they couldn't be uming
Perfect	V-ing perfect
I couldn't have umed you couldn't have umed he couldn't have umed we couldn't have umed you couldn't have umed they couldn't have umed	I couldn't have been uming you couldn't have been uming he couldn't have been uming we couldn't have been uming you couldn't have been uming they couldn't have been uming

Interrogative form

Simple form	V-ing form
could I um? could you um? could he um? could we um? could you um? could they um?	could I be uming? could you be uming? could he be uming? could we be uming? could you be uming? could they be uming?
Perfect	V-ing perfect
could I have umed? could you have umed? could he have umed? could we have umed? could you have umed? could they have umed?	could I have been uming? could you have been uming? could he have been uming? could we have been uming? could you have been uming? could they have been uming?

Interro-negative form

Simple form	V-ing form
couldn't I um? couldn't you um? couldn't he um? couldn't we um? couldn't you um? couldn't they um?	couldn't I be uming? couldn't you be uming? couldn't he be uming? couldn't we be uming? couldn't you be uming? couldn't they be uming?
Perfect	V-ing perfect
couldn't I have umed? couldn't you have umed? couldn't he have umed? couldn't we have umed? couldn't you have umed? couldn't they have umed?	couldn't I have been uming? couldn't you have been uming? couldn't he have been uming? couldn't we have been uming? couldn't you have been uming? couldn't they have been uming?