English verb conjugation
COULD PROPEL

Regular verb: propel - propelled - propelled

Affirmation

Simple form	V-ing form
I could propel you could propel she could propel we could propel you could propel they could propel	I could be propelling you could be propelling she could be propelling we could be propelling you could be propelling they could be propelling
Perfect	V-ing perfect
I could have propelled you could have propelled she could have propelled we could have propelled you could have propelled they could have propelled	I could have been propelling you could have been propelling she could have been propelling we could have been propelling you could have been propelling they could have been propelling

Negation

Simple form	V-ing form
I could not propel you could not propel she could not propel we could not propel you could not propel they could not propel	I could not be propelling you could not be propelling she could not be propelling we could not be propelling you could not be propelling they could not be propelling
Perfect	V-ing perfect
I could not have propelled you could not have propelled she could not have propelled we could not have propelled you could not have propelled they could not have propelled	I could not have been propelling you could not have been propelling she could not have been propelling we could not have been propelling you could not have been propelling they could not have been propelling

Interrogative form

Simple form	V-ing form
could I propel? could you propel? could she propel? could we propel? could you propel? could they propel?	could I be propelling? could you be propelling? could she be propelling? could we be propelling? could you be propelling? could they be propelling?
Perfect	V-ing perfect
could I have propelled? could you have propelled? could she have propelled? could we have propelled? could you have propelled? could they have propelled?	could I have been propelling? could you have been propelling? could she have been propelling? could we have been propelling? could you have been propelling? could they have been propelling?

Interro-negative form

Simple form	V-ing form
could I not propel? could you not propel? could she not propel? could we not propel? could you not propel? could they not propel?	could I not be propelling? could you not be propelling? could she not be propelling? could we not be propelling? could you not be propelling? could they not be propelling?
Perfect	V-ing perfect
could I not have propelled? could you not have propelled? could she not have propelled? could we not have propelled? could you not have propelled? could they not have propelled?	could I not have been propelling? could you not have been propelling? could she not have been propelling? could we not have been propelling? could you not have been propelling? could they not have been propelling?