English verb conjugation
COULD TWIST

Regular verb: twist - twisted - twisted

Affirmation

Simple form	V-ing form
I could twist you could twist he could twist we could twist you could twist they could twist	I could be twisting you could be twisting he could be twisting we could be twisting you could be twisting they could be twisting
Perfect	V-ing perfect
I could have twisted you could have twisted he could have twisted we could have twisted you could have twisted they could have twisted	I could have been twisting you could have been twisting he could have been twisting we could have been twisting you could have been twisting they could have been twisting

Negation

Simple form	V-ing form
I couldn't twist you couldn't twist he couldn't twist we couldn't twist you couldn't twist they couldn't twist	I couldn't be twisting you couldn't be twisting he couldn't be twisting we couldn't be twisting you couldn't be twisting they couldn't be twisting
Perfect	V-ing perfect
I couldn't have twisted you couldn't have twisted he couldn't have twisted we couldn't have twisted you couldn't have twisted they couldn't have twisted	I couldn't have been twisting you couldn't have been twisting he couldn't have been twisting we couldn't have been twisting you couldn't have been twisting they couldn't have been twisting

Interrogative form

Simple form	V-ing form
could I twist? could you twist? could he twist? could we twist? could you twist? could they twist?	could I be twisting? could you be twisting? could he be twisting? could we be twisting? could you be twisting? could they be twisting?
Perfect	V-ing perfect
could I have twisted? could you have twisted? could he have twisted? could we have twisted? could you have twisted? could they have twisted?	could I have been twisting? could you have been twisting? could he have been twisting? could we have been twisting? could you have been twisting? could they have been twisting?

Interro-negative form

Simple form	V-ing form
couldn't I twist? couldn't you twist? couldn't he twist? couldn't we twist? couldn't you twist? couldn't they twist?	couldn't I be twisting? couldn't you be twisting? couldn't he be twisting? couldn't we be twisting? couldn't you be twisting? couldn't they be twisting?
Perfect	V-ing perfect
couldn't I have twisted? couldn't you have twisted? couldn't he have twisted? couldn't we have twisted? couldn't you have twisted? couldn't they have twisted?	couldn't I have been twisting? couldn't you have been twisting? couldn't he have been twisting? couldn't we have been twisting? couldn't you have been twisting? couldn't they have been twisting?