English verb conjugation
COULD THRONG

Regular verb: throng - thronged - thronged

Affirmation

Simple form	V-ing form
I could throng you could throng he could throng we could throng you could throng they could throng	I could be thronging you could be thronging he could be thronging we could be thronging you could be thronging they could be thronging
Perfect	V-ing perfect
I could have thronged you could have thronged he could have thronged we could have thronged you could have thronged they could have thronged	I could have been thronging you could have been thronging he could have been thronging we could have been thronging you could have been thronging they could have been thronging

Negation

Simple form	V-ing form
I could not throng you could not throng he could not throng we could not throng you could not throng they could not throng	I could not be thronging you could not be thronging he could not be thronging we could not be thronging you could not be thronging they could not be thronging
Perfect	V-ing perfect
I could not have thronged you could not have thronged he could not have thronged we could not have thronged you could not have thronged they could not have thronged	I could not have been thronging you could not have been thronging he could not have been thronging we could not have been thronging you could not have been thronging they could not have been thronging

Interrogative form

Simple form	V-ing form
could I throng? could you throng? could he throng? could we throng? could you throng? could they throng?	could I be thronging? could you be thronging? could he be thronging? could we be thronging? could you be thronging? could they be thronging?
Perfect	V-ing perfect
could I have thronged? could you have thronged? could he have thronged? could we have thronged? could you have thronged? could they have thronged?	could I have been thronging? could you have been thronging? could he have been thronging? could we have been thronging? could you have been thronging? could they have been thronging?

Interro-negative form

Simple form	V-ing form
could I not throng? could you not throng? could he not throng? could we not throng? could you not throng? could they not throng?	could I not be thronging? could you not be thronging? could he not be thronging? could we not be thronging? could you not be thronging? could they not be thronging?
Perfect	V-ing perfect
could I not have thronged? could you not have thronged? could he not have thronged? could we not have thronged? could you not have thronged? could they not have thronged?	could I not have been thronging? could you not have been thronging? could he not have been thronging? could we not have been thronging? could you not have been thronging? could they not have been thronging?