I could rig you could rig she could rig we could rig you could rig they could rig
V-ing form
I could be rigging you could be rigging she could be rigging we could be rigging you could be rigging they could be rigging
Perfect
I could have rigged you could have rigged she could have rigged we could have rigged you could have rigged they could have rigged
V-ing perfect
I could have been rigging you could have been rigging she could have been rigging we could have been rigging you could have been rigging they could have been rigging
Negation
Simple form
I couldn't rig you couldn't rig she couldn't rig we couldn't rig you couldn't rig they couldn't rig
V-ing form
I couldn't be rigging you couldn't be rigging she couldn't be rigging we couldn't be rigging you couldn't be rigging they couldn't be rigging
Perfect
I couldn't have rigged you couldn't have rigged she couldn't have rigged we couldn't have rigged you couldn't have rigged they couldn't have rigged
V-ing perfect
I couldn't have been rigging you couldn't have been rigging she couldn't have been rigging we couldn't have been rigging you couldn't have been rigging they couldn't have been rigging
Interrogative form
Simple form
could I rig? could you rig? could she rig? could we rig? could you rig? could they rig?
V-ing form
could I be rigging? could you be rigging? could she be rigging? could we be rigging? could you be rigging? could they be rigging?
Perfect
could I have rigged? could you have rigged? could she have rigged? could we have rigged? could you have rigged? could they have rigged?
V-ing perfect
could I have been rigging? could you have been rigging? could she have been rigging? could we have been rigging? could you have been rigging? could they have been rigging?
Interro-negative form
Simple form
couldn't I rig? couldn't you rig? couldn't she rig? couldn't we rig? couldn't you rig? couldn't they rig?
V-ing form
couldn't I be rigging? couldn't you be rigging? couldn't she be rigging? couldn't we be rigging? couldn't you be rigging? couldn't they be rigging?
Perfect
couldn't I have rigged? couldn't you have rigged? couldn't she have rigged? couldn't we have rigged? couldn't you have rigged? couldn't they have rigged?
V-ing perfect
couldn't I have been rigging? couldn't you have been rigging? couldn't she have been rigging? couldn't we have been rigging? couldn't you have been rigging? couldn't they have been rigging?