could campaign
Regular verb: campaign - campaigned- campaigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could campaign
you could campaign
he could campaign
we could campaign
you could campaign
they could campaign 	I could be campaigning
you could be campaigning
he could be campaigning
we could be campaigning
you could be campaigning
they could be campaigning	I could have campaigned
you could have campaigned
he could have campaigned
we could have campaigned
you could have campaigned
they could have campaigned	I could have been campaigning
you could have been campaigning
he could have been campaigning
we could have been campaigning
you could have been campaigning
they could have been campaigning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't campaign
you couldn't campaign
he couldn't campaign
we couldn't campaign
you couldn't campaign
they couldn't campaign 	I couldn't be campaigning
you couldn't be campaigning
he couldn't be campaigning
we couldn't be campaigning
you couldn't be campaigning
they couldn't be campaigning	I couldn't have campaigned
you couldn't have campaigned
he couldn't have campaigned
we couldn't have campaigned
you couldn't have campaigned
they couldn't have campaigned	I couldn't have been campaigning
you couldn't have been campaigning
he couldn't have been campaigning
we couldn't have been campaigning
you couldn't have been campaigning
they couldn't have been campaigning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I campaign?
could you campaign?
could he campaign?
could we campaign?
could you campaign?
could they campaign? 	could I be campaigning?
could you be campaigning?
could he be campaigning?
could we be campaigning?
could you be campaigning?
could they be campaigning? 	could I have campaigned?
could you have campaigned?
could he have campaigned?
could we have campaigned?
could you have campaigned?
could they have campaigned? 	could I have been campaigning?
could you have been campaigning?
could he have been campaigning?
could we have been campaigning?
could you have been campaigning?
could they have been campaigning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I campaign?
couldn't you campaign?
couldn't he campaign?
couldn't we campaign?
couldn't you campaign?
couldn't they campaign? 	couldn't I be campaigning?
couldn't you be campaigning?
couldn't he be campaigning?
couldn't we be campaigning?
couldn't you be campaigning?
couldn't they be campaigning? 	couldn't I have campaigned?
couldn't you have campaigned?
couldn't he have campaigned?
couldn't we have campaigned?
couldn't you have campaigned?
couldn't they have campaigned? 	couldn't I have been campaigning?
couldn't you have been campaigning?
couldn't he have been campaigning?
couldn't we have been campaigning?
couldn't you have been campaigning?
couldn't they have been campaigning?