English verb conjugation
COULD COLOUR

Regular verb: colour - coloured - coloured

Affirmation

Simple form	V-ing form
I could colour you could colour she could colour we could colour you could colour they could colour	I could be colouring you could be colouring she could be colouring we could be colouring you could be colouring they could be colouring
Perfect	V-ing perfect
I could have coloured you could have coloured she could have coloured we could have coloured you could have coloured they could have coloured	I could have been colouring you could have been colouring she could have been colouring we could have been colouring you could have been colouring they could have been colouring

Negation

Simple form	V-ing form
I couldn't colour you couldn't colour she couldn't colour we couldn't colour you couldn't colour they couldn't colour	I couldn't be colouring you couldn't be colouring she couldn't be colouring we couldn't be colouring you couldn't be colouring they couldn't be colouring
Perfect	V-ing perfect
I couldn't have coloured you couldn't have coloured she couldn't have coloured we couldn't have coloured you couldn't have coloured they couldn't have coloured	I couldn't have been colouring you couldn't have been colouring she couldn't have been colouring we couldn't have been colouring you couldn't have been colouring they couldn't have been colouring

Interrogative form

Simple form	V-ing form
could I colour? could you colour? could she colour? could we colour? could you colour? could they colour?	could I be colouring? could you be colouring? could she be colouring? could we be colouring? could you be colouring? could they be colouring?
Perfect	V-ing perfect
could I have coloured? could you have coloured? could she have coloured? could we have coloured? could you have coloured? could they have coloured?	could I have been colouring? could you have been colouring? could she have been colouring? could we have been colouring? could you have been colouring? could they have been colouring?

Interro-negative form

Simple form	V-ing form
couldn't I colour? couldn't you colour? couldn't she colour? couldn't we colour? couldn't you colour? couldn't they colour?	couldn't I be colouring? couldn't you be colouring? couldn't she be colouring? couldn't we be colouring? couldn't you be colouring? couldn't they be colouring?
Perfect	V-ing perfect
couldn't I have coloured? couldn't you have coloured? couldn't she have coloured? couldn't we have coloured? couldn't you have coloured? couldn't they have coloured?	couldn't I have been colouring? couldn't you have been colouring? couldn't she have been colouring? couldn't we have been colouring? couldn't you have been colouring? couldn't they have been colouring?