I could steer you could steer he could steer we could steer you could steer they could steer
V-ing form
I could be steering you could be steering he could be steering we could be steering you could be steering they could be steering
Perfect
I could have steered you could have steered he could have steered we could have steered you could have steered they could have steered
V-ing perfect
I could have been steering you could have been steering he could have been steering we could have been steering you could have been steering they could have been steering
Negation
Simple form
I couldn't steer you couldn't steer he couldn't steer we couldn't steer you couldn't steer they couldn't steer
V-ing form
I couldn't be steering you couldn't be steering he couldn't be steering we couldn't be steering you couldn't be steering they couldn't be steering
Perfect
I couldn't have steered you couldn't have steered he couldn't have steered we couldn't have steered you couldn't have steered they couldn't have steered
V-ing perfect
I couldn't have been steering you couldn't have been steering he couldn't have been steering we couldn't have been steering you couldn't have been steering they couldn't have been steering
Interrogative form
Simple form
could I steer? could you steer? could he steer? could we steer? could you steer? could they steer?
V-ing form
could I be steering? could you be steering? could he be steering? could we be steering? could you be steering? could they be steering?
Perfect
could I have steered? could you have steered? could he have steered? could we have steered? could you have steered? could they have steered?
V-ing perfect
could I have been steering? could you have been steering? could he have been steering? could we have been steering? could you have been steering? could they have been steering?
Interro-negative form
Simple form
couldn't I steer? couldn't you steer? couldn't he steer? couldn't we steer? couldn't you steer? couldn't they steer?
V-ing form
couldn't I be steering? couldn't you be steering? couldn't he be steering? couldn't we be steering? couldn't you be steering? couldn't they be steering?
Perfect
couldn't I have steered? couldn't you have steered? couldn't he have steered? couldn't we have steered? couldn't you have steered? couldn't they have steered?
V-ing perfect
couldn't I have been steering? couldn't you have been steering? couldn't he have been steering? couldn't we have been steering? couldn't you have been steering? couldn't they have been steering?