I could repel you could repel he could repel we could repel you could repel they could repel
V-ing form
I could be repelling you could be repelling he could be repelling we could be repelling you could be repelling they could be repelling
Perfect
I could have repelled you could have repelled he could have repelled we could have repelled you could have repelled they could have repelled
V-ing perfect
I could have been repelling you could have been repelling he could have been repelling we could have been repelling you could have been repelling they could have been repelling
Negation
Simple form
I could not repel you could not repel he could not repel we could not repel you could not repel they could not repel
V-ing form
I could not be repelling you could not be repelling he could not be repelling we could not be repelling you could not be repelling they could not be repelling
Perfect
I could not have repelled you could not have repelled he could not have repelled we could not have repelled you could not have repelled they could not have repelled
V-ing perfect
I could not have been repelling you could not have been repelling he could not have been repelling we could not have been repelling you could not have been repelling they could not have been repelling
Interrogative form
Simple form
could I repel? could you repel? could he repel? could we repel? could you repel? could they repel?
V-ing form
could I be repelling? could you be repelling? could he be repelling? could we be repelling? could you be repelling? could they be repelling?
Perfect
could I have repelled? could you have repelled? could he have repelled? could we have repelled? could you have repelled? could they have repelled?
V-ing perfect
could I have been repelling? could you have been repelling? could he have been repelling? could we have been repelling? could you have been repelling? could they have been repelling?
Interro-negative form
Simple form
could I not repel? could you not repel? could he not repel? could we not repel? could you not repel? could they not repel?
V-ing form
could I not be repelling? could you not be repelling? could he not be repelling? could we not be repelling? could you not be repelling? could they not be repelling?
Perfect
could I not have repelled? could you not have repelled? could he not have repelled? could we not have repelled? could you not have repelled? could they not have repelled?
V-ing perfect
could I not have been repelling? could you not have been repelling? could he not have been repelling? could we not have been repelling? could you not have been repelling? could they not have been repelling?