Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could dialogue you could dialogue she could dialogue we could dialogue you could dialogue they could dialogue
V-ing form
I could be dialoguing you could be dialoguing she could be dialoguing we could be dialoguing you could be dialoguing they could be dialoguing
Perfect
I could have dialogued you could have dialogued she could have dialogued we could have dialogued you could have dialogued they could have dialogued
V-ing perfect
I could have been dialoguing you could have been dialoguing she could have been dialoguing we could have been dialoguing you could have been dialoguing they could have been dialoguing
Negation
Simple form
I couldn't dialogue you couldn't dialogue she couldn't dialogue we couldn't dialogue you couldn't dialogue they couldn't dialogue
V-ing form
I couldn't be dialoguing you couldn't be dialoguing she couldn't be dialoguing we couldn't be dialoguing you couldn't be dialoguing they couldn't be dialoguing
Perfect
I couldn't have dialogued you couldn't have dialogued she couldn't have dialogued we couldn't have dialogued you couldn't have dialogued they couldn't have dialogued
V-ing perfect
I couldn't have been dialoguing you couldn't have been dialoguing she couldn't have been dialoguing we couldn't have been dialoguing you couldn't have been dialoguing they couldn't have been dialoguing
Interrogative form
Simple form
could I dialogue? could you dialogue? could she dialogue? could we dialogue? could you dialogue? could they dialogue?
V-ing form
could I be dialoguing? could you be dialoguing? could she be dialoguing? could we be dialoguing? could you be dialoguing? could they be dialoguing?
Perfect
could I have dialogued? could you have dialogued? could she have dialogued? could we have dialogued? could you have dialogued? could they have dialogued?
V-ing perfect
could I have been dialoguing? could you have been dialoguing? could she have been dialoguing? could we have been dialoguing? could you have been dialoguing? could they have been dialoguing?
Interro-negative form
Simple form
couldn't I dialogue? couldn't you dialogue? couldn't she dialogue? couldn't we dialogue? couldn't you dialogue? couldn't they dialogue?
V-ing form
couldn't I be dialoguing? couldn't you be dialoguing? couldn't she be dialoguing? couldn't we be dialoguing? couldn't you be dialoguing? couldn't they be dialoguing?
Perfect
couldn't I have dialogued? couldn't you have dialogued? couldn't she have dialogued? couldn't we have dialogued? couldn't you have dialogued? couldn't they have dialogued?
V-ing perfect
couldn't I have been dialoguing? couldn't you have been dialoguing? couldn't she have been dialoguing? couldn't we have been dialoguing? couldn't you have been dialoguing? couldn't they have been dialoguing?