English verb conjugation
COULD RUPTURE

Regular verb: rupture - ruptured - ruptured

Affirmation

Simple form	V-ing form
I could rupture you could rupture he could rupture we could rupture you could rupture they could rupture	I could be rupturing you could be rupturing he could be rupturing we could be rupturing you could be rupturing they could be rupturing
Perfect	V-ing perfect
I could have ruptured you could have ruptured he could have ruptured we could have ruptured you could have ruptured they could have ruptured	I could have been rupturing you could have been rupturing he could have been rupturing we could have been rupturing you could have been rupturing they could have been rupturing

Negation

Simple form	V-ing form
I could not rupture you could not rupture he could not rupture we could not rupture you could not rupture they could not rupture	I could not be rupturing you could not be rupturing he could not be rupturing we could not be rupturing you could not be rupturing they could not be rupturing
Perfect	V-ing perfect
I could not have ruptured you could not have ruptured he could not have ruptured we could not have ruptured you could not have ruptured they could not have ruptured	I could not have been rupturing you could not have been rupturing he could not have been rupturing we could not have been rupturing you could not have been rupturing they could not have been rupturing

Interrogative form

Simple form	V-ing form
could I rupture? could you rupture? could he rupture? could we rupture? could you rupture? could they rupture?	could I be rupturing? could you be rupturing? could he be rupturing? could we be rupturing? could you be rupturing? could they be rupturing?
Perfect	V-ing perfect
could I have ruptured? could you have ruptured? could he have ruptured? could we have ruptured? could you have ruptured? could they have ruptured?	could I have been rupturing? could you have been rupturing? could he have been rupturing? could we have been rupturing? could you have been rupturing? could they have been rupturing?

Interro-negative form

Simple form	V-ing form
could I not rupture? could you not rupture? could he not rupture? could we not rupture? could you not rupture? could they not rupture?	could I not be rupturing? could you not be rupturing? could he not be rupturing? could we not be rupturing? could you not be rupturing? could they not be rupturing?
Perfect	V-ing perfect
could I not have ruptured? could you not have ruptured? could he not have ruptured? could we not have ruptured? could you not have ruptured? could they not have ruptured?	could I not have been rupturing? could you not have been rupturing? could he not have been rupturing? could we not have been rupturing? could you not have been rupturing? could they not have been rupturing?