English verb conjugation
COULD UNTWINE

Regular verb: untwine - untwined - untwined

Affirmation

Simple form	V-ing form
I could untwine you could untwine he could untwine we could untwine you could untwine they could untwine	I could be untwining you could be untwining he could be untwining we could be untwining you could be untwining they could be untwining
Perfect	V-ing perfect
I could have untwined you could have untwined he could have untwined we could have untwined you could have untwined they could have untwined	I could have been untwining you could have been untwining he could have been untwining we could have been untwining you could have been untwining they could have been untwining

Negation

Simple form	V-ing form
I could not untwine you could not untwine he could not untwine we could not untwine you could not untwine they could not untwine	I could not be untwining you could not be untwining he could not be untwining we could not be untwining you could not be untwining they could not be untwining
Perfect	V-ing perfect
I could not have untwined you could not have untwined he could not have untwined we could not have untwined you could not have untwined they could not have untwined	I could not have been untwining you could not have been untwining he could not have been untwining we could not have been untwining you could not have been untwining they could not have been untwining

Interrogative form

Simple form	V-ing form
could I untwine? could you untwine? could he untwine? could we untwine? could you untwine? could they untwine?	could I be untwining? could you be untwining? could he be untwining? could we be untwining? could you be untwining? could they be untwining?
Perfect	V-ing perfect
could I have untwined? could you have untwined? could he have untwined? could we have untwined? could you have untwined? could they have untwined?	could I have been untwining? could you have been untwining? could he have been untwining? could we have been untwining? could you have been untwining? could they have been untwining?

Interro-negative form

Simple form	V-ing form
could I not untwine? could you not untwine? could he not untwine? could we not untwine? could you not untwine? could they not untwine?	could I not be untwining? could you not be untwining? could he not be untwining? could we not be untwining? could you not be untwining? could they not be untwining?
Perfect	V-ing perfect
could I not have untwined? could you not have untwined? could he not have untwined? could we not have untwined? could you not have untwined? could they not have untwined?	could I not have been untwining? could you not have been untwining? could he not have been untwining? could we not have been untwining? could you not have been untwining? could they not have been untwining?