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