English verb conjugation
COULD RIPPLE

Regular verb: ripple - rippled - rippled

Affirmation

Simple form	V-ing form
I could ripple you could ripple he could ripple we could ripple you could ripple they could ripple	I could be rippling you could be rippling he 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 he 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 he 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 he 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 he 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 he 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 he 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 he ripple? could we ripple? could you ripple? could they ripple?	could I be rippling? could you be rippling? could he 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 he 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 he 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 he 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 he 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 he 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 he not have been rippling? could we not have been rippling? could you not have been rippling? could they not have been rippling?