English verb conjugation
COULD MATERIALIZE

Regular verb: materialize - materialized - materialized

Affirmation

Simple form	V-ing form
I could materialize you could materialize she could materialize we could materialize you could materialize they could materialize	I could be materializing you could be materializing she could be materializing we could be materializing you could be materializing they could be materializing
Perfect	V-ing perfect
I could have materialized you could have materialized she could have materialized we could have materialized you could have materialized they could have materialized	I could have been materializing you could have been materializing she could have been materializing we could have been materializing you could have been materializing they could have been materializing

Negation

Simple form	V-ing form
I couldn't materialize you couldn't materialize she couldn't materialize we couldn't materialize you couldn't materialize they couldn't materialize	I couldn't be materializing you couldn't be materializing she couldn't be materializing we couldn't be materializing you couldn't be materializing they couldn't be materializing
Perfect	V-ing perfect
I couldn't have materialized you couldn't have materialized she couldn't have materialized we couldn't have materialized you couldn't have materialized they couldn't have materialized	I couldn't have been materializing you couldn't have been materializing she couldn't have been materializing we couldn't have been materializing you couldn't have been materializing they couldn't have been materializing

Interrogative form

Simple form	V-ing form
could I materialize? could you materialize? could she materialize? could we materialize? could you materialize? could they materialize?	could I be materializing? could you be materializing? could she be materializing? could we be materializing? could you be materializing? could they be materializing?
Perfect	V-ing perfect
could I have materialized? could you have materialized? could she have materialized? could we have materialized? could you have materialized? could they have materialized?	could I have been materializing? could you have been materializing? could she have been materializing? could we have been materializing? could you have been materializing? could they have been materializing?

Interro-negative form

Simple form	V-ing form
couldn't I materialize? couldn't you materialize? couldn't she materialize? couldn't we materialize? couldn't you materialize? couldn't they materialize?	couldn't I be materializing? couldn't you be materializing? couldn't she be materializing? couldn't we be materializing? couldn't you be materializing? couldn't they be materializing?
Perfect	V-ing perfect
couldn't I have materialized? couldn't you have materialized? couldn't she have materialized? couldn't we have materialized? couldn't you have materialized? couldn't they have materialized?	couldn't I have been materializing? couldn't you have been materializing? couldn't she have been materializing? couldn't we have been materializing? couldn't you have been materializing? couldn't they have been materializing?