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