English verb conjugation
COULD DIABOLISE

Regular verb: diabolise - diabolised - diabolised

Affirmation

Simple form	V-ing form
I could diabolise you could diabolise he could diabolise we could diabolise you could diabolise they could diabolise	I could be diabolising you could be diabolising he could be diabolising we could be diabolising you could be diabolising they could be diabolising
Perfect	V-ing perfect
I could have diabolised you could have diabolised he could have diabolised we could have diabolised you could have diabolised they could have diabolised	I could have been diabolising you could have been diabolising he could have been diabolising we could have been diabolising you could have been diabolising they could have been diabolising

Negation

Simple form	V-ing form
I couldn't diabolise you couldn't diabolise he couldn't diabolise we couldn't diabolise you couldn't diabolise they couldn't diabolise	I couldn't be diabolising you couldn't be diabolising he couldn't be diabolising we couldn't be diabolising you couldn't be diabolising they couldn't be diabolising
Perfect	V-ing perfect
I couldn't have diabolised you couldn't have diabolised he couldn't have diabolised we couldn't have diabolised you couldn't have diabolised they couldn't have diabolised	I couldn't have been diabolising you couldn't have been diabolising he couldn't have been diabolising we couldn't have been diabolising you couldn't have been diabolising they couldn't have been diabolising

Interrogative form

Simple form	V-ing form
could I diabolise? could you diabolise? could he diabolise? could we diabolise? could you diabolise? could they diabolise?	could I be diabolising? could you be diabolising? could he be diabolising? could we be diabolising? could you be diabolising? could they be diabolising?
Perfect	V-ing perfect
could I have diabolised? could you have diabolised? could he have diabolised? could we have diabolised? could you have diabolised? could they have diabolised?	could I have been diabolising? could you have been diabolising? could he have been diabolising? could we have been diabolising? could you have been diabolising? could they have been diabolising?

Interro-negative form

Simple form	V-ing form
couldn't I diabolise? couldn't you diabolise? couldn't he diabolise? couldn't we diabolise? couldn't you diabolise? couldn't they diabolise?	couldn't I be diabolising? couldn't you be diabolising? couldn't he be diabolising? couldn't we be diabolising? couldn't you be diabolising? couldn't they be diabolising?
Perfect	V-ing perfect
couldn't I have diabolised? couldn't you have diabolised? couldn't he have diabolised? couldn't we have diabolised? couldn't you have diabolised? couldn't they have diabolised?	couldn't I have been diabolising? couldn't you have been diabolising? couldn't he have been diabolising? couldn't we have been diabolising? couldn't you have been diabolising? couldn't they have been diabolising?