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