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 could not campaign
you could not campaign
he could not campaign
we could not campaign
you could not campaign
they could not campaign 	I could not be campaigning
you could not be campaigning
he could not be campaigning
we could not be campaigning
you could not be campaigning
they could not be campaigning	I could not have campaigned
you could not have campaigned
he could not have campaigned
we could not have campaigned
you could not have campaigned
they could not have campaigned	I could not have been campaigning
you could not have been campaigning
he could not have been campaigning
we could not have been campaigning
you could not have been campaigning
they could not 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 	
could I not campaign?
could you not campaign?
could he not campaign?
could we not campaign?
could you not campaign?
could they not campaign? 	could I not be campaigning?
could you not be campaigning?
could he not be campaigning?
could we not be campaigning?
could you not be campaigning?
could they not be campaigning? 	could I not have campaigned?
could you not have campaigned?
could he not have campaigned?
could we not have campaigned?
could you not have campaigned?
could they not have campaigned? 	could I not have been campaigning?
could you not have been campaigning?
could he not have been campaigning?
could we not have been campaigning?
could you not have been campaigning?
could they not have been campaigning?