English verb conjugation
COULD PLUMMET

Regular verb: plummet - plummeted - plummeted

Affirmation

Simple form	V-ing form
I could plummet you could plummet he could plummet we could plummet you could plummet they could plummet	I could be plummeting you could be plummeting he could be plummeting we could be plummeting you could be plummeting they could be plummeting
Perfect	V-ing perfect
I could have plummeted you could have plummeted he could have plummeted we could have plummeted you could have plummeted they could have plummeted	I could have been plummeting you could have been plummeting he could have been plummeting we could have been plummeting you could have been plummeting they could have been plummeting

Negation

Simple form	V-ing form
I could not plummet you could not plummet he could not plummet we could not plummet you could not plummet they could not plummet	I could not be plummeting you could not be plummeting he could not be plummeting we could not be plummeting you could not be plummeting they could not be plummeting
Perfect	V-ing perfect
I could not have plummeted you could not have plummeted he could not have plummeted we could not have plummeted you could not have plummeted they could not have plummeted	I could not have been plummeting you could not have been plummeting he could not have been plummeting we could not have been plummeting you could not have been plummeting they could not have been plummeting

Interrogative form

Simple form	V-ing form
could I plummet? could you plummet? could he plummet? could we plummet? could you plummet? could they plummet?	could I be plummeting? could you be plummeting? could he be plummeting? could we be plummeting? could you be plummeting? could they be plummeting?
Perfect	V-ing perfect
could I have plummeted? could you have plummeted? could he have plummeted? could we have plummeted? could you have plummeted? could they have plummeted?	could I have been plummeting? could you have been plummeting? could he have been plummeting? could we have been plummeting? could you have been plummeting? could they have been plummeting?

Interro-negative form

Simple form	V-ing form
could I not plummet? could you not plummet? could he not plummet? could we not plummet? could you not plummet? could they not plummet?	could I not be plummeting? could you not be plummeting? could he not be plummeting? could we not be plummeting? could you not be plummeting? could they not be plummeting?
Perfect	V-ing perfect
could I not have plummeted? could you not have plummeted? could he not have plummeted? could we not have plummeted? could you not have plummeted? could they not have plummeted?	could I not have been plummeting? could you not have been plummeting? could he not have been plummeting? could we not have been plummeting? could you not have been plummeting? could they not have been plummeting?