I could sideslip you could sideslip she could sideslip we could sideslip you could sideslip they could sideslip
V-ing form
I could be sidesliping you could be sidesliping she could be sidesliping we could be sidesliping you could be sidesliping they could be sidesliping
Perfect
I could have sidesliped you could have sidesliped she could have sidesliped we could have sidesliped you could have sidesliped they could have sidesliped
V-ing perfect
I could have been sidesliping you could have been sidesliping she could have been sidesliping we could have been sidesliping you could have been sidesliping they could have been sidesliping
Negation
Simple form
I could not sideslip you could not sideslip she could not sideslip we could not sideslip you could not sideslip they could not sideslip
V-ing form
I could not be sidesliping you could not be sidesliping she could not be sidesliping we could not be sidesliping you could not be sidesliping they could not be sidesliping
Perfect
I could not have sidesliped you could not have sidesliped she could not have sidesliped we could not have sidesliped you could not have sidesliped they could not have sidesliped
V-ing perfect
I could not have been sidesliping you could not have been sidesliping she could not have been sidesliping we could not have been sidesliping you could not have been sidesliping they could not have been sidesliping
Interrogative form
Simple form
could I sideslip? could you sideslip? could she sideslip? could we sideslip? could you sideslip? could they sideslip?
V-ing form
could I be sidesliping? could you be sidesliping? could she be sidesliping? could we be sidesliping? could you be sidesliping? could they be sidesliping?
Perfect
could I have sidesliped? could you have sidesliped? could she have sidesliped? could we have sidesliped? could you have sidesliped? could they have sidesliped?
V-ing perfect
could I have been sidesliping? could you have been sidesliping? could she have been sidesliping? could we have been sidesliping? could you have been sidesliping? could they have been sidesliping?
Interro-negative form
Simple form
could I not sideslip? could you not sideslip? could she not sideslip? could we not sideslip? could you not sideslip? could they not sideslip?
V-ing form
could I not be sidesliping? could you not be sidesliping? could she not be sidesliping? could we not be sidesliping? could you not be sidesliping? could they not be sidesliping?
Perfect
could I not have sidesliped? could you not have sidesliped? could she not have sidesliped? could we not have sidesliped? could you not have sidesliped? could they not have sidesliped?
V-ing perfect
could I not have been sidesliping? could you not have been sidesliping? could she not have been sidesliping? could we not have been sidesliping? could you not have been sidesliping? could they not have been sidesliping?