English verb conjugation
COULD REJUVENATE

Regular verb: rejuvenate - rejuvenated - rejuvenated

Affirmation

Simple form	V-ing form
I could rejuvenate you could rejuvenate he could rejuvenate we could rejuvenate you could rejuvenate they could rejuvenate	I could be rejuvenating you could be rejuvenating he could be rejuvenating we could be rejuvenating you could be rejuvenating they could be rejuvenating
Perfect	V-ing perfect
I could have rejuvenated you could have rejuvenated he could have rejuvenated we could have rejuvenated you could have rejuvenated they could have rejuvenated	I could have been rejuvenating you could have been rejuvenating he could have been rejuvenating we could have been rejuvenating you could have been rejuvenating they could have been rejuvenating

Negation

Simple form	V-ing form
I could not rejuvenate you could not rejuvenate he could not rejuvenate we could not rejuvenate you could not rejuvenate they could not rejuvenate	I could not be rejuvenating you could not be rejuvenating he could not be rejuvenating we could not be rejuvenating you could not be rejuvenating they could not be rejuvenating
Perfect	V-ing perfect
I could not have rejuvenated you could not have rejuvenated he could not have rejuvenated we could not have rejuvenated you could not have rejuvenated they could not have rejuvenated	I could not have been rejuvenating you could not have been rejuvenating he could not have been rejuvenating we could not have been rejuvenating you could not have been rejuvenating they could not have been rejuvenating

Interrogative form

Simple form	V-ing form
could I rejuvenate? could you rejuvenate? could he rejuvenate? could we rejuvenate? could you rejuvenate? could they rejuvenate?	could I be rejuvenating? could you be rejuvenating? could he be rejuvenating? could we be rejuvenating? could you be rejuvenating? could they be rejuvenating?
Perfect	V-ing perfect
could I have rejuvenated? could you have rejuvenated? could he have rejuvenated? could we have rejuvenated? could you have rejuvenated? could they have rejuvenated?	could I have been rejuvenating? could you have been rejuvenating? could he have been rejuvenating? could we have been rejuvenating? could you have been rejuvenating? could they have been rejuvenating?

Interro-negative form

Simple form	V-ing form
could I not rejuvenate? could you not rejuvenate? could he not rejuvenate? could we not rejuvenate? could you not rejuvenate? could they not rejuvenate?	could I not be rejuvenating? could you not be rejuvenating? could he not be rejuvenating? could we not be rejuvenating? could you not be rejuvenating? could they not be rejuvenating?
Perfect	V-ing perfect
could I not have rejuvenated? could you not have rejuvenated? could he not have rejuvenated? could we not have rejuvenated? could you not have rejuvenated? could they not have rejuvenated?	could I not have been rejuvenating? could you not have been rejuvenating? could he not have been rejuvenating? could we not have been rejuvenating? could you not have been rejuvenating? could they not have been rejuvenating?