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 couldn't throng you couldn't throng he couldn't throng we couldn't throng you couldn't throng they couldn't throng	I couldn't be thronging you couldn't be thronging he couldn't be thronging we couldn't be thronging you couldn't be thronging they couldn't be thronging
Perfect	V-ing perfect
I couldn't have thronged you couldn't have thronged he couldn't have thronged we couldn't have thronged you couldn't have thronged they couldn't have thronged	I couldn't have been thronging you couldn't have been thronging he couldn't have been thronging we couldn't have been thronging you couldn't have been thronging they couldn't 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
couldn't I throng? couldn't you throng? couldn't he throng? couldn't we throng? couldn't you throng? couldn't they throng?	couldn't I be thronging? couldn't you be thronging? couldn't he be thronging? couldn't we be thronging? couldn't you be thronging? couldn't they be thronging?
Perfect	V-ing perfect
couldn't I have thronged? couldn't you have thronged? couldn't he have thronged? couldn't we have thronged? couldn't you have thronged? couldn't they have thronged?	couldn't I have been thronging? couldn't you have been thronging? couldn't he have been thronging? couldn't we have been thronging? couldn't you have been thronging? couldn't they have been thronging?