could picket
Regular verb: picket - picketed- picketed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could picket
you could picket
he could picket
we could picket
you could picket
they could picket 	I could be picketing
you could be picketing
he could be picketing
we could be picketing
you could be picketing
they could be picketing	I could have picketed
you could have picketed
he could have picketed
we could have picketed
you could have picketed
they could have picketed	I could have been picketing
you could have been picketing
he could have been picketing
we could have been picketing
you could have been picketing
they could have been picketing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't picket
you couldn't picket
he couldn't picket
we couldn't picket
you couldn't picket
they couldn't picket 	I couldn't be picketing
you couldn't be picketing
he couldn't be picketing
we couldn't be picketing
you couldn't be picketing
they couldn't be picketing	I couldn't have picketed
you couldn't have picketed
he couldn't have picketed
we couldn't have picketed
you couldn't have picketed
they couldn't have picketed	I couldn't have been picketing
you couldn't have been picketing
he couldn't have been picketing
we couldn't have been picketing
you couldn't have been picketing
they couldn't have been picketing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I picket?
could you picket?
could he picket?
could we picket?
could you picket?
could they picket? 	could I be picketing?
could you be picketing?
could he be picketing?
could we be picketing?
could you be picketing?
could they be picketing? 	could I have picketed?
could you have picketed?
could he have picketed?
could we have picketed?
could you have picketed?
could they have picketed? 	could I have been picketing?
could you have been picketing?
could he have been picketing?
could we have been picketing?
could you have been picketing?
could they have been picketing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I picket?
couldn't you picket?
couldn't he picket?
couldn't we picket?
couldn't you picket?
couldn't they picket? 	couldn't I be picketing?
couldn't you be picketing?
couldn't he be picketing?
couldn't we be picketing?
couldn't you be picketing?
couldn't they be picketing? 	couldn't I have picketed?
couldn't you have picketed?
couldn't he have picketed?
couldn't we have picketed?
couldn't you have picketed?
couldn't they have picketed? 	couldn't I have been picketing?
couldn't you have been picketing?
couldn't he have been picketing?
couldn't we have been picketing?
couldn't you have been picketing?
couldn't they have been picketing?