English verb conjugation
COULD RIPPLE

Regular verb: ripple - rippled - rippled

Affirmation

Simple form	V-ing form
I could ripple you could ripple she could ripple we could ripple you could ripple they could ripple	I could be rippling you could be rippling she could be rippling we could be rippling you could be rippling they could be rippling
Perfect	V-ing perfect
I could have rippled you could have rippled she could have rippled we could have rippled you could have rippled they could have rippled	I could have been rippling you could have been rippling she could have been rippling we could have been rippling you could have been rippling they could have been rippling

Negation

Simple form	V-ing form
I could not ripple you could not ripple she could not ripple we could not ripple you could not ripple they could not ripple	I could not be rippling you could not be rippling she could not be rippling we could not be rippling you could not be rippling they could not be rippling
Perfect	V-ing perfect
I could not have rippled you could not have rippled she could not have rippled we could not have rippled you could not have rippled they could not have rippled	I could not have been rippling you could not have been rippling she could not have been rippling we could not have been rippling you could not have been rippling they could not have been rippling

Interrogative form

Simple form	V-ing form
could I ripple? could you ripple? could she ripple? could we ripple? could you ripple? could they ripple?	could I be rippling? could you be rippling? could she be rippling? could we be rippling? could you be rippling? could they be rippling?
Perfect	V-ing perfect
could I have rippled? could you have rippled? could she have rippled? could we have rippled? could you have rippled? could they have rippled?	could I have been rippling? could you have been rippling? could she have been rippling? could we have been rippling? could you have been rippling? could they have been rippling?

Interro-negative form

Simple form	V-ing form
could I not ripple? could you not ripple? could she not ripple? could we not ripple? could you not ripple? could they not ripple?	could I not be rippling? could you not be rippling? could she not be rippling? could we not be rippling? could you not be rippling? could they not be rippling?
Perfect	V-ing perfect
could I not have rippled? could you not have rippled? could she not have rippled? could we not have rippled? could you not have rippled? could they not have rippled?	could I not have been rippling? could you not have been rippling? could she not have been rippling? could we not have been rippling? could you not have been rippling? could they not have been rippling?