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 couldn't swerve you couldn't swerve she couldn't swerve we couldn't swerve you couldn't swerve they couldn't swerve
V-ing form
I couldn't be swerving you couldn't be swerving she couldn't be swerving we couldn't be swerving you couldn't be swerving they couldn't be swerving
Perfect
I couldn't have swerved you couldn't have swerved she couldn't have swerved we couldn't have swerved you couldn't have swerved they couldn't have swerved
V-ing perfect
I couldn't have been swerving you couldn't have been swerving she couldn't have been swerving we couldn't have been swerving you couldn't have been swerving they couldn't 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
couldn't I swerve? couldn't you swerve? couldn't she swerve? couldn't we swerve? couldn't you swerve? couldn't they swerve?
V-ing form
couldn't I be swerving? couldn't you be swerving? couldn't she be swerving? couldn't we be swerving? couldn't you be swerving? couldn't they be swerving?
Perfect
couldn't I have swerved? couldn't you have swerved? couldn't she have swerved? couldn't we have swerved? couldn't you have swerved? couldn't they have swerved?
V-ing perfect
couldn't I have been swerving? couldn't you have been swerving? couldn't she have been swerving? couldn't we have been swerving? couldn't you have been swerving? couldn't they have been swerving?