English verb conjugation
COULD IMMATERIALISE

Regular verb: immaterialise - immaterialised - immaterialised

Affirmation

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