English verb conjugation
COULD THICKEN THICKEN

Regular verb: thicken thicken - thicken thickened - thicken thickened

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could thicken thicken you could thicken thicken he could thicken thicken we could thicken thicken you could thicken thicken they could thicken thicken	I could be thicken thickening you could be thicken thickening he could be thicken thickening we could be thicken thickening you could be thicken thickening they could be thicken thickening
Perfect	V-ing perfect
I could have thicken thickened you could have thicken thickened he could have thicken thickened we could have thicken thickened you could have thicken thickened they could have thicken thickened	I could have been thicken thickening you could have been thicken thickening he could have been thicken thickening we could have been thicken thickening you could have been thicken thickening they could have been thicken thickening

Negation

Simple form	V-ing form
I could not thicken thicken you could not thicken thicken he could not thicken thicken we could not thicken thicken you could not thicken thicken they could not thicken thicken	I could not be thicken thickening you could not be thicken thickening he could not be thicken thickening we could not be thicken thickening you could not be thicken thickening they could not be thicken thickening
Perfect	V-ing perfect
I could not have thicken thickened you could not have thicken thickened he could not have thicken thickened we could not have thicken thickened you could not have thicken thickened they could not have thicken thickened	I could not have been thicken thickening you could not have been thicken thickening he could not have been thicken thickening we could not have been thicken thickening you could not have been thicken thickening they could not have been thicken thickening

Interrogative form

Simple form	V-ing form
could I thicken thicken? could you thicken thicken? could he thicken thicken? could we thicken thicken? could you thicken thicken? could they thicken thicken?	could I be thicken thickening? could you be thicken thickening? could he be thicken thickening? could we be thicken thickening? could you be thicken thickening? could they be thicken thickening?
Perfect	V-ing perfect
could I have thicken thickened? could you have thicken thickened? could he have thicken thickened? could we have thicken thickened? could you have thicken thickened? could they have thicken thickened?	could I have been thicken thickening? could you have been thicken thickening? could he have been thicken thickening? could we have been thicken thickening? could you have been thicken thickening? could they have been thicken thickening?

Interro-negative form

Simple form	V-ing form
could I not thicken thicken? could you not thicken thicken? could he not thicken thicken? could we not thicken thicken? could you not thicken thicken? could they not thicken thicken?	could I not be thicken thickening? could you not be thicken thickening? could he not be thicken thickening? could we not be thicken thickening? could you not be thicken thickening? could they not be thicken thickening?
Perfect	V-ing perfect
could I not have thicken thickened? could you not have thicken thickened? could he not have thicken thickened? could we not have thicken thickened? could you not have thicken thickened? could they not have thicken thickened?	could I not have been thicken thickening? could you not have been thicken thickening? could he not have been thicken thickening? could we not have been thicken thickening? could you not have been thicken thickening? could they not have been thicken thickening?