English verb conjugation
COULD COLOURISE

Regular verb: colourise - colourised - colourised

Affirmation

Simple form	V-ing form
I could colourise you could colourise she could colourise we could colourise you could colourise they could colourise	I could be colourising you could be colourising she could be colourising we could be colourising you could be colourising they could be colourising
Perfect	V-ing perfect
I could have colourised you could have colourised she could have colourised we could have colourised you could have colourised they could have colourised	I could have been colourising you could have been colourising she could have been colourising we could have been colourising you could have been colourising they could have been colourising

Negation

Simple form	V-ing form
I couldn't colourise you couldn't colourise she couldn't colourise we couldn't colourise you couldn't colourise they couldn't colourise	I couldn't be colourising you couldn't be colourising she couldn't be colourising we couldn't be colourising you couldn't be colourising they couldn't be colourising
Perfect	V-ing perfect
I couldn't have colourised you couldn't have colourised she couldn't have colourised we couldn't have colourised you couldn't have colourised they couldn't have colourised	I couldn't have been colourising you couldn't have been colourising she couldn't have been colourising we couldn't have been colourising you couldn't have been colourising they couldn't have been colourising

Interrogative form

Simple form	V-ing form
could I colourise? could you colourise? could she colourise? could we colourise? could you colourise? could they colourise?	could I be colourising? could you be colourising? could she be colourising? could we be colourising? could you be colourising? could they be colourising?
Perfect	V-ing perfect
could I have colourised? could you have colourised? could she have colourised? could we have colourised? could you have colourised? could they have colourised?	could I have been colourising? could you have been colourising? could she have been colourising? could we have been colourising? could you have been colourising? could they have been colourising?

Interro-negative form

Simple form	V-ing form
couldn't I colourise? couldn't you colourise? couldn't she colourise? couldn't we colourise? couldn't you colourise? couldn't they colourise?	couldn't I be colourising? couldn't you be colourising? couldn't she be colourising? couldn't we be colourising? couldn't you be colourising? couldn't they be colourising?
Perfect	V-ing perfect
couldn't I have colourised? couldn't you have colourised? couldn't she have colourised? couldn't we have colourised? couldn't you have colourised? couldn't they have colourised?	couldn't I have been colourising? couldn't you have been colourising? couldn't she have been colourising? couldn't we have been colourising? couldn't you have been colourising? couldn't they have been colourising?