English verb conjugation
COULD TANGLE

Regular verb: tangle - tangled - tangled

Affirmation

Simple form	V-ing form
I could tangle you could tangle he could tangle we could tangle you could tangle they could tangle	I could be tangling you could be tangling he could be tangling we could be tangling you could be tangling they could be tangling
Perfect	V-ing perfect
I could have tangled you could have tangled he could have tangled we could have tangled you could have tangled they could have tangled	I could have been tangling you could have been tangling he could have been tangling we could have been tangling you could have been tangling they could have been tangling

Negation

Simple form	V-ing form
I could not tangle you could not tangle he could not tangle we could not tangle you could not tangle they could not tangle	I could not be tangling you could not be tangling he could not be tangling we could not be tangling you could not be tangling they could not be tangling
Perfect	V-ing perfect
I could not have tangled you could not have tangled he could not have tangled we could not have tangled you could not have tangled they could not have tangled	I could not have been tangling you could not have been tangling he could not have been tangling we could not have been tangling you could not have been tangling they could not have been tangling

Interrogative form

Simple form	V-ing form
could I tangle? could you tangle? could he tangle? could we tangle? could you tangle? could they tangle?	could I be tangling? could you be tangling? could he be tangling? could we be tangling? could you be tangling? could they be tangling?
Perfect	V-ing perfect
could I have tangled? could you have tangled? could he have tangled? could we have tangled? could you have tangled? could they have tangled?	could I have been tangling? could you have been tangling? could he have been tangling? could we have been tangling? could you have been tangling? could they have been tangling?

Interro-negative form

Simple form	V-ing form
could I not tangle? could you not tangle? could he not tangle? could we not tangle? could you not tangle? could they not tangle?	could I not be tangling? could you not be tangling? could he not be tangling? could we not be tangling? could you not be tangling? could they not be tangling?
Perfect	V-ing perfect
could I not have tangled? could you not have tangled? could he not have tangled? could we not have tangled? could you not have tangled? could they not have tangled?	could I not have been tangling? could you not have been tangling? could he not have been tangling? could we not have been tangling? could you not have been tangling? could they not have been tangling?