could influence
Regular verb: influence - influenced- influenced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could influence
you could influence
he could influence
we could influence
you could influence
they could influence 	I could be influencing
you could be influencing
he could be influencing
we could be influencing
you could be influencing
they could be influencing	I could have influenced
you could have influenced
he could have influenced
we could have influenced
you could have influenced
they could have influenced	I could have been influencing
you could have been influencing
he could have been influencing
we could have been influencing
you could have been influencing
they could have been influencing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't influence
you couldn't influence
he couldn't influence
we couldn't influence
you couldn't influence
they couldn't influence 	I couldn't be influencing
you couldn't be influencing
he couldn't be influencing
we couldn't be influencing
you couldn't be influencing
they couldn't be influencing	I couldn't have influenced
you couldn't have influenced
he couldn't have influenced
we couldn't have influenced
you couldn't have influenced
they couldn't have influenced	I couldn't have been influencing
you couldn't have been influencing
he couldn't have been influencing
we couldn't have been influencing
you couldn't have been influencing
they couldn't have been influencing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I influence?
could you influence?
could he influence?
could we influence?
could you influence?
could they influence? 	could I be influencing?
could you be influencing?
could he be influencing?
could we be influencing?
could you be influencing?
could they be influencing? 	could I have influenced?
could you have influenced?
could he have influenced?
could we have influenced?
could you have influenced?
could they have influenced? 	could I have been influencing?
could you have been influencing?
could he have been influencing?
could we have been influencing?
could you have been influencing?
could they have been influencing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I influence?
couldn't you influence?
couldn't he influence?
couldn't we influence?
couldn't you influence?
couldn't they influence? 	couldn't I be influencing?
couldn't you be influencing?
couldn't he be influencing?
couldn't we be influencing?
couldn't you be influencing?
couldn't they be influencing? 	couldn't I have influenced?
couldn't you have influenced?
couldn't he have influenced?
couldn't we have influenced?
couldn't you have influenced?
couldn't they have influenced? 	couldn't I have been influencing?
couldn't you have been influencing?
couldn't he have been influencing?
couldn't we have been influencing?
couldn't you have been influencing?
couldn't they have been influencing?