English verb conjugation
COULD WRITHE

Regular verb: writhe - writhed - writhed

Affirmation

Simple form	V-ing form
I could writhe you could writhe he could writhe we could writhe you could writhe they could writhe	I could be writhing you could be writhing he could be writhing we could be writhing you could be writhing they could be writhing
Perfect	V-ing perfect
I could have writhed you could have writhed he could have writhed we could have writhed you could have writhed they could have writhed	I could have been writhing you could have been writhing he could have been writhing we could have been writhing you could have been writhing they could have been writhing

Negation

Simple form	V-ing form
I could not writhe you could not writhe he could not writhe we could not writhe you could not writhe they could not writhe	I could not be writhing you could not be writhing he could not be writhing we could not be writhing you could not be writhing they could not be writhing
Perfect	V-ing perfect
I could not have writhed you could not have writhed he could not have writhed we could not have writhed you could not have writhed they could not have writhed	I could not have been writhing you could not have been writhing he could not have been writhing we could not have been writhing you could not have been writhing they could not have been writhing

Interrogative form

Simple form	V-ing form
could I writhe? could you writhe? could he writhe? could we writhe? could you writhe? could they writhe?	could I be writhing? could you be writhing? could he be writhing? could we be writhing? could you be writhing? could they be writhing?
Perfect	V-ing perfect
could I have writhed? could you have writhed? could he have writhed? could we have writhed? could you have writhed? could they have writhed?	could I have been writhing? could you have been writhing? could he have been writhing? could we have been writhing? could you have been writhing? could they have been writhing?

Interro-negative form

Simple form	V-ing form
could I not writhe? could you not writhe? could he not writhe? could we not writhe? could you not writhe? could they not writhe?	could I not be writhing? could you not be writhing? could he not be writhing? could we not be writhing? could you not be writhing? could they not be writhing?
Perfect	V-ing perfect
could I not have writhed? could you not have writhed? could he not have writhed? could we not have writhed? could you not have writhed? could they not have writhed?	could I not have been writhing? could you not have been writhing? could he not have been writhing? could we not have been writhing? could you not have been writhing? could they not have been writhing?