English verb conjugation
COULD PLUMMET

Regular verb: plummet - plummeted - plummeted

Affirmation

Simple form	V-ing form
I could plummet you could plummet she could plummet we could plummet you could plummet they could plummet	I could be plummeting you could be plummeting she 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 she 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 she 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 couldn't plummet you couldn't plummet she couldn't plummet we couldn't plummet you couldn't plummet they couldn't plummet	I couldn't be plummeting you couldn't be plummeting she couldn't be plummeting we couldn't be plummeting you couldn't be plummeting they couldn't be plummeting
Perfect	V-ing perfect
I couldn't have plummeted you couldn't have plummeted she couldn't have plummeted we couldn't have plummeted you couldn't have plummeted they couldn't have plummeted	I couldn't have been plummeting you couldn't have been plummeting she couldn't have been plummeting we couldn't have been plummeting you couldn't have been plummeting they couldn't have been plummeting

Interrogative form

Simple form	V-ing form
could I plummet? could you plummet? could she plummet? could we plummet? could you plummet? could they plummet?	could I be plummeting? could you be plummeting? could she 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 she 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 she 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
couldn't I plummet? couldn't you plummet? couldn't she plummet? couldn't we plummet? couldn't you plummet? couldn't they plummet?	couldn't I be plummeting? couldn't you be plummeting? couldn't she be plummeting? couldn't we be plummeting? couldn't you be plummeting? couldn't they be plummeting?
Perfect	V-ing perfect
couldn't I have plummeted? couldn't you have plummeted? couldn't she have plummeted? couldn't we have plummeted? couldn't you have plummeted? couldn't they have plummeted?	couldn't I have been plummeting? couldn't you have been plummeting? couldn't she have been plummeting? couldn't we have been plummeting? couldn't you have been plummeting? couldn't they have been plummeting?