English verb conjugation
COULD COLOURISE

Regular verb: colourise - colourised - colourised

Affirmation

Simple form	V-ing form
I could colourise you could colourise he could colourise we could colourise you could colourise they could colourise	I could be colourising you could be colourising he 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 he 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 he 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 he 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 he 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 he 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 he 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 he colourise? could we colourise? could you colourise? could they colourise?	could I be colourising? could you be colourising? could he 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 he 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 he 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 he 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 he 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 he 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 he have been colourising? couldn't we have been colourising? couldn't you have been colourising? couldn't they have been colourising?