could evidence
Regular verb: evidence - evidenced- evidenced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could evidence
you could evidence
he could evidence
we could evidence
you could evidence
they could evidence 	I could be evidencing
you could be evidencing
he could be evidencing
we could be evidencing
you could be evidencing
they could be evidencing	I could have evidenced
you could have evidenced
he could have evidenced
we could have evidenced
you could have evidenced
they could have evidenced	I could have been evidencing
you could have been evidencing
he could have been evidencing
we could have been evidencing
you could have been evidencing
they could have been evidencing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't evidence
you couldn't evidence
he couldn't evidence
we couldn't evidence
you couldn't evidence
they couldn't evidence 	I couldn't be evidencing
you couldn't be evidencing
he couldn't be evidencing
we couldn't be evidencing
you couldn't be evidencing
they couldn't be evidencing	I couldn't have evidenced
you couldn't have evidenced
he couldn't have evidenced
we couldn't have evidenced
you couldn't have evidenced
they couldn't have evidenced	I couldn't have been evidencing
you couldn't have been evidencing
he couldn't have been evidencing
we couldn't have been evidencing
you couldn't have been evidencing
they couldn't have been evidencing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I evidence?
could you evidence?
could he evidence?
could we evidence?
could you evidence?
could they evidence? 	could I be evidencing?
could you be evidencing?
could he be evidencing?
could we be evidencing?
could you be evidencing?
could they be evidencing? 	could I have evidenced?
could you have evidenced?
could he have evidenced?
could we have evidenced?
could you have evidenced?
could they have evidenced? 	could I have been evidencing?
could you have been evidencing?
could he have been evidencing?
could we have been evidencing?
could you have been evidencing?
could they have been evidencing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I evidence?
couldn't you evidence?
couldn't he evidence?
couldn't we evidence?
couldn't you evidence?
couldn't they evidence? 	couldn't I be evidencing?
couldn't you be evidencing?
couldn't he be evidencing?
couldn't we be evidencing?
couldn't you be evidencing?
couldn't they be evidencing? 	couldn't I have evidenced?
couldn't you have evidenced?
couldn't he have evidenced?
couldn't we have evidenced?
couldn't you have evidenced?
couldn't they have evidenced? 	couldn't I have been evidencing?
couldn't you have been evidencing?
couldn't he have been evidencing?
couldn't we have been evidencing?
couldn't you have been evidencing?
couldn't they have been evidencing?