I could swerve you could swerve she could swerve we could swerve you could swerve they could swerve
V-ing form
I could be swerving you could be swerving she could be swerving we could be swerving you could be swerving they could be swerving
Perfect
I could have swerved you could have swerved she could have swerved we could have swerved you could have swerved they could have swerved
V-ing perfect
I could have been swerving you could have been swerving she could have been swerving we could have been swerving you could have been swerving they could have been swerving
Negation
Simple form
I could not swerve you could not swerve she could not swerve we could not swerve you could not swerve they could not swerve
V-ing form
I could not be swerving you could not be swerving she could not be swerving we could not be swerving you could not be swerving they could not be swerving
Perfect
I could not have swerved you could not have swerved she could not have swerved we could not have swerved you could not have swerved they could not have swerved
V-ing perfect
I could not have been swerving you could not have been swerving she could not have been swerving we could not have been swerving you could not have been swerving they could not have been swerving
Interrogative form
Simple form
could I swerve? could you swerve? could she swerve? could we swerve? could you swerve? could they swerve?
V-ing form
could I be swerving? could you be swerving? could she be swerving? could we be swerving? could you be swerving? could they be swerving?
Perfect
could I have swerved? could you have swerved? could she have swerved? could we have swerved? could you have swerved? could they have swerved?
V-ing perfect
could I have been swerving? could you have been swerving? could she have been swerving? could we have been swerving? could you have been swerving? could they have been swerving?
Interro-negative form
Simple form
could I not swerve? could you not swerve? could she not swerve? could we not swerve? could you not swerve? could they not swerve?
V-ing form
could I not be swerving? could you not be swerving? could she not be swerving? could we not be swerving? could you not be swerving? could they not be swerving?
Perfect
could I not have swerved? could you not have swerved? could she not have swerved? could we not have swerved? could you not have swerved? could they not have swerved?
V-ing perfect
could I not have been swerving? could you not have been swerving? could she not have been swerving? could we not have been swerving? could you not have been swerving? could they not have been swerving?