English verb conjugation
COULD BOUNCE

Regular verb: bounce - bounced - bounced

Affirmation

Simple form	V-ing form
I could bounce you could bounce he could bounce we could bounce you could bounce they could bounce	I could be bouncing you could be bouncing he could be bouncing we could be bouncing you could be bouncing they could be bouncing
Perfect	V-ing perfect
I could have bounced you could have bounced he could have bounced we could have bounced you could have bounced they could have bounced	I could have been bouncing you could have been bouncing he could have been bouncing we could have been bouncing you could have been bouncing they could have been bouncing

Negation

Simple form	V-ing form
I couldn't bounce you couldn't bounce he couldn't bounce we couldn't bounce you couldn't bounce they couldn't bounce	I couldn't be bouncing you couldn't be bouncing he couldn't be bouncing we couldn't be bouncing you couldn't be bouncing they couldn't be bouncing
Perfect	V-ing perfect
I couldn't have bounced you couldn't have bounced he couldn't have bounced we couldn't have bounced you couldn't have bounced they couldn't have bounced	I couldn't have been bouncing you couldn't have been bouncing he couldn't have been bouncing we couldn't have been bouncing you couldn't have been bouncing they couldn't have been bouncing

Interrogative form

Simple form	V-ing form
could I bounce? could you bounce? could he bounce? could we bounce? could you bounce? could they bounce?	could I be bouncing? could you be bouncing? could he be bouncing? could we be bouncing? could you be bouncing? could they be bouncing?
Perfect	V-ing perfect
could I have bounced? could you have bounced? could he have bounced? could we have bounced? could you have bounced? could they have bounced?	could I have been bouncing? could you have been bouncing? could he have been bouncing? could we have been bouncing? could you have been bouncing? could they have been bouncing?

Interro-negative form

Simple form	V-ing form
couldn't I bounce? couldn't you bounce? couldn't he bounce? couldn't we bounce? couldn't you bounce? couldn't they bounce?	couldn't I be bouncing? couldn't you be bouncing? couldn't he be bouncing? couldn't we be bouncing? couldn't you be bouncing? couldn't they be bouncing?
Perfect	V-ing perfect
couldn't I have bounced? couldn't you have bounced? couldn't he have bounced? couldn't we have bounced? couldn't you have bounced? couldn't they have bounced?	couldn't I have been bouncing? couldn't you have been bouncing? couldn't he have been bouncing? couldn't we have been bouncing? couldn't you have been bouncing? couldn't they have been bouncing?