English verb conjugation
COULD IMMATERIALIZE

Regular verb: immaterialize - immaterialized - immaterialized

Affirmation

Simple form	V-ing form
I could immaterialize you could immaterialize he could immaterialize we could immaterialize you could immaterialize they could immaterialize	I could be immaterializing you could be immaterializing he could be immaterializing we could be immaterializing you could be immaterializing they could be immaterializing
Perfect	V-ing perfect
I could have immaterialized you could have immaterialized he could have immaterialized we could have immaterialized you could have immaterialized they could have immaterialized	I could have been immaterializing you could have been immaterializing he could have been immaterializing we could have been immaterializing you could have been immaterializing they could have been immaterializing

Negation

Simple form	V-ing form
I couldn't immaterialize you couldn't immaterialize he couldn't immaterialize we couldn't immaterialize you couldn't immaterialize they couldn't immaterialize	I couldn't be immaterializing you couldn't be immaterializing he couldn't be immaterializing we couldn't be immaterializing you couldn't be immaterializing they couldn't be immaterializing
Perfect	V-ing perfect
I couldn't have immaterialized you couldn't have immaterialized he couldn't have immaterialized we couldn't have immaterialized you couldn't have immaterialized they couldn't have immaterialized	I couldn't have been immaterializing you couldn't have been immaterializing he couldn't have been immaterializing we couldn't have been immaterializing you couldn't have been immaterializing they couldn't have been immaterializing

Interrogative form

Simple form	V-ing form
could I immaterialize? could you immaterialize? could he immaterialize? could we immaterialize? could you immaterialize? could they immaterialize?	could I be immaterializing? could you be immaterializing? could he be immaterializing? could we be immaterializing? could you be immaterializing? could they be immaterializing?
Perfect	V-ing perfect
could I have immaterialized? could you have immaterialized? could he have immaterialized? could we have immaterialized? could you have immaterialized? could they have immaterialized?	could I have been immaterializing? could you have been immaterializing? could he have been immaterializing? could we have been immaterializing? could you have been immaterializing? could they have been immaterializing?

Interro-negative form

Simple form	V-ing form
couldn't I immaterialize? couldn't you immaterialize? couldn't he immaterialize? couldn't we immaterialize? couldn't you immaterialize? couldn't they immaterialize?	couldn't I be immaterializing? couldn't you be immaterializing? couldn't he be immaterializing? couldn't we be immaterializing? couldn't you be immaterializing? couldn't they be immaterializing?
Perfect	V-ing perfect
couldn't I have immaterialized? couldn't you have immaterialized? couldn't he have immaterialized? couldn't we have immaterialized? couldn't you have immaterialized? couldn't they have immaterialized?	couldn't I have been immaterializing? couldn't you have been immaterializing? couldn't he have been immaterializing? couldn't we have been immaterializing? couldn't you have been immaterializing? couldn't they have been immaterializing?