English verb conjugation
COULD IMMATERIALISE

Regular verb: immaterialise - immaterialised - immaterialised

Affirmation

Simple form	V-ing form
I could immaterialise you could immaterialise she could immaterialise we could immaterialise you could immaterialise they could immaterialise	I could be immaterialising you could be immaterialising she could be immaterialising we could be immaterialising you could be immaterialising they could be immaterialising
Perfect	V-ing perfect
I could have immaterialised you could have immaterialised she could have immaterialised we could have immaterialised you could have immaterialised they could have immaterialised	I could have been immaterialising you could have been immaterialising she could have been immaterialising we could have been immaterialising you could have been immaterialising they could have been immaterialising

Negation

Simple form	V-ing form
I couldn't immaterialise you couldn't immaterialise she couldn't immaterialise we couldn't immaterialise you couldn't immaterialise they couldn't immaterialise	I couldn't be immaterialising you couldn't be immaterialising she couldn't be immaterialising we couldn't be immaterialising you couldn't be immaterialising they couldn't be immaterialising
Perfect	V-ing perfect
I couldn't have immaterialised you couldn't have immaterialised she couldn't have immaterialised we couldn't have immaterialised you couldn't have immaterialised they couldn't have immaterialised	I couldn't have been immaterialising you couldn't have been immaterialising she couldn't have been immaterialising we couldn't have been immaterialising you couldn't have been immaterialising they couldn't have been immaterialising

Interrogative form

Simple form	V-ing form
could I immaterialise? could you immaterialise? could she immaterialise? could we immaterialise? could you immaterialise? could they immaterialise?	could I be immaterialising? could you be immaterialising? could she be immaterialising? could we be immaterialising? could you be immaterialising? could they be immaterialising?
Perfect	V-ing perfect
could I have immaterialised? could you have immaterialised? could she have immaterialised? could we have immaterialised? could you have immaterialised? could they have immaterialised?	could I have been immaterialising? could you have been immaterialising? could she have been immaterialising? could we have been immaterialising? could you have been immaterialising? could they have been immaterialising?

Interro-negative form

Simple form	V-ing form
couldn't I immaterialise? couldn't you immaterialise? couldn't she immaterialise? couldn't we immaterialise? couldn't you immaterialise? couldn't they immaterialise?	couldn't I be immaterialising? couldn't you be immaterialising? couldn't she be immaterialising? couldn't we be immaterialising? couldn't you be immaterialising? couldn't they be immaterialising?
Perfect	V-ing perfect
couldn't I have immaterialised? couldn't you have immaterialised? couldn't she have immaterialised? couldn't we have immaterialised? couldn't you have immaterialised? couldn't they have immaterialised?	couldn't I have been immaterialising? couldn't you have been immaterialising? couldn't she have been immaterialising? couldn't we have been immaterialising? couldn't you have been immaterialising? couldn't they have been immaterialising?