Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could bark at you could bark at she could bark at we could bark at you could bark at they could bark at
V-ing form
I could be bark ating you could be bark ating she could be bark ating we could be bark ating you could be bark ating they could be bark ating
Perfect
I could have bark ated you could have bark ated she could have bark ated we could have bark ated you could have bark ated they could have bark ated
V-ing perfect
I could have been bark ating you could have been bark ating she could have been bark ating we could have been bark ating you could have been bark ating they could have been bark ating
Negation
Simple form
I could not bark at you could not bark at she could not bark at we could not bark at you could not bark at they could not bark at
V-ing form
I could not be bark ating you could not be bark ating she could not be bark ating we could not be bark ating you could not be bark ating they could not be bark ating
Perfect
I could not have bark ated you could not have bark ated she could not have bark ated we could not have bark ated you could not have bark ated they could not have bark ated
V-ing perfect
I could not have been bark ating you could not have been bark ating she could not have been bark ating we could not have been bark ating you could not have been bark ating they could not have been bark ating
Interrogative form
Simple form
could I bark at? could you bark at? could she bark at? could we bark at? could you bark at? could they bark at?
V-ing form
could I be bark ating? could you be bark ating? could she be bark ating? could we be bark ating? could you be bark ating? could they be bark ating?
Perfect
could I have bark ated? could you have bark ated? could she have bark ated? could we have bark ated? could you have bark ated? could they have bark ated?
V-ing perfect
could I have been bark ating? could you have been bark ating? could she have been bark ating? could we have been bark ating? could you have been bark ating? could they have been bark ating?
Interro-negative form
Simple form
could I not bark at? could you not bark at? could she not bark at? could we not bark at? could you not bark at? could they not bark at?
V-ing form
could I not be bark ating? could you not be bark ating? could she not be bark ating? could we not be bark ating? could you not be bark ating? could they not be bark ating?
Perfect
could I not have bark ated? could you not have bark ated? could she not have bark ated? could we not have bark ated? could you not have bark ated? could they not have bark ated?
V-ing perfect
could I not have been bark ating? could you not have been bark ating? could she not have been bark ating? could we not have been bark ating? could you not have been bark ating? could they not have been bark ating?