English verb conjugation
COULD PLASTICIZE

Regular verb: plasticize - plasticized - plasticized

Affirmation

Simple form	V-ing form
I could plasticize you could plasticize she could plasticize we could plasticize you could plasticize they could plasticize	I could be plasticizing you could be plasticizing she could be plasticizing we could be plasticizing you could be plasticizing they could be plasticizing
Perfect	V-ing perfect
I could have plasticized you could have plasticized she could have plasticized we could have plasticized you could have plasticized they could have plasticized	I could have been plasticizing you could have been plasticizing she could have been plasticizing we could have been plasticizing you could have been plasticizing they could have been plasticizing

Negation

Simple form	V-ing form
I couldn't plasticize you couldn't plasticize she couldn't plasticize we couldn't plasticize you couldn't plasticize they couldn't plasticize	I couldn't be plasticizing you couldn't be plasticizing she couldn't be plasticizing we couldn't be plasticizing you couldn't be plasticizing they couldn't be plasticizing
Perfect	V-ing perfect
I couldn't have plasticized you couldn't have plasticized she couldn't have plasticized we couldn't have plasticized you couldn't have plasticized they couldn't have plasticized	I couldn't have been plasticizing you couldn't have been plasticizing she couldn't have been plasticizing we couldn't have been plasticizing you couldn't have been plasticizing they couldn't have been plasticizing

Interrogative form

Simple form	V-ing form
could I plasticize? could you plasticize? could she plasticize? could we plasticize? could you plasticize? could they plasticize?	could I be plasticizing? could you be plasticizing? could she be plasticizing? could we be plasticizing? could you be plasticizing? could they be plasticizing?
Perfect	V-ing perfect
could I have plasticized? could you have plasticized? could she have plasticized? could we have plasticized? could you have plasticized? could they have plasticized?	could I have been plasticizing? could you have been plasticizing? could she have been plasticizing? could we have been plasticizing? could you have been plasticizing? could they have been plasticizing?

Interro-negative form

Simple form	V-ing form
couldn't I plasticize? couldn't you plasticize? couldn't she plasticize? couldn't we plasticize? couldn't you plasticize? couldn't they plasticize?	couldn't I be plasticizing? couldn't you be plasticizing? couldn't she be plasticizing? couldn't we be plasticizing? couldn't you be plasticizing? couldn't they be plasticizing?
Perfect	V-ing perfect
couldn't I have plasticized? couldn't you have plasticized? couldn't she have plasticized? couldn't we have plasticized? couldn't you have plasticized? couldn't they have plasticized?	couldn't I have been plasticizing? couldn't you have been plasticizing? couldn't she have been plasticizing? couldn't we have been plasticizing? couldn't you have been plasticizing? couldn't they have been plasticizing?