could rig
Regular verb: rig - rigged- rigged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rig
you could rig
she could rig
we could rig
you could rig
they could rig 	I could be rigging
you could be rigging
she could be rigging
we could be rigging
you could be rigging
they could be rigging	I could have rigged
you could have rigged
she could have rigged
we could have rigged
you could have rigged
they could have rigged	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 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rig
you couldn't rig
she couldn't rig
we couldn't rig
you couldn't rig
they couldn't rig 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
could I rig?
could you rig?
could she rig?
could we rig?
could you rig?
could they rig? 	could I be rigging?
could you be rigging?
could she be rigging?
could we be rigging?
could you be rigging?
could they be rigging? 	could I have rigged?
could you have rigged?
could she have rigged?
could we have rigged?
could you have rigged?
could they have rigged? 	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 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rig?
couldn't you rig?
couldn't she rig?
couldn't we rig?
couldn't you rig?
couldn't they rig? 	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? 	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? 	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?