English verb conjugation
COULD FENCE

Regular verb: fence - fenced - fenced

Affirmation

Simple form	V-ing form
I could fence you could fence she could fence we could fence you could fence they could fence	I could be fencing you could be fencing she could be fencing we could be fencing you could be fencing they could be fencing
Perfect	V-ing perfect
I could have fenced you could have fenced she could have fenced we could have fenced you could have fenced they could have fenced	I could have been fencing you could have been fencing she could have been fencing we could have been fencing you could have been fencing they could have been fencing

Negation

Simple form	V-ing form
I couldn't fence you couldn't fence she couldn't fence we couldn't fence you couldn't fence they couldn't fence	I couldn't be fencing you couldn't be fencing she couldn't be fencing we couldn't be fencing you couldn't be fencing they couldn't be fencing
Perfect	V-ing perfect
I couldn't have fenced you couldn't have fenced she couldn't have fenced we couldn't have fenced you couldn't have fenced they couldn't have fenced	I couldn't have been fencing you couldn't have been fencing she couldn't have been fencing we couldn't have been fencing you couldn't have been fencing they couldn't have been fencing

Interrogative form

Simple form	V-ing form
could I fence? could you fence? could she fence? could we fence? could you fence? could they fence?	could I be fencing? could you be fencing? could she be fencing? could we be fencing? could you be fencing? could they be fencing?
Perfect	V-ing perfect
could I have fenced? could you have fenced? could she have fenced? could we have fenced? could you have fenced? could they have fenced?	could I have been fencing? could you have been fencing? could she have been fencing? could we have been fencing? could you have been fencing? could they have been fencing?

Interro-negative form

Simple form	V-ing form
couldn't I fence? couldn't you fence? couldn't she fence? couldn't we fence? couldn't you fence? couldn't they fence?	couldn't I be fencing? couldn't you be fencing? couldn't she be fencing? couldn't we be fencing? couldn't you be fencing? couldn't they be fencing?
Perfect	V-ing perfect
couldn't I have fenced? couldn't you have fenced? couldn't she have fenced? couldn't we have fenced? couldn't you have fenced? couldn't they have fenced?	couldn't I have been fencing? couldn't you have been fencing? couldn't she have been fencing? couldn't we have been fencing? couldn't you have been fencing? couldn't they have been fencing?