I could doggone you could doggone he could doggone we could doggone you could doggone they could doggone
V-ing form
I could be doggoning you could be doggoning he could be doggoning we could be doggoning you could be doggoning they could be doggoning
Perfect
I could have doggoned you could have doggoned he could have doggoned we could have doggoned you could have doggoned they could have doggoned
V-ing perfect
I could have been doggoning you could have been doggoning he could have been doggoning we could have been doggoning you could have been doggoning they could have been doggoning
Negation
Simple form
I couldn't doggone you couldn't doggone he couldn't doggone we couldn't doggone you couldn't doggone they couldn't doggone
V-ing form
I couldn't be doggoning you couldn't be doggoning he couldn't be doggoning we couldn't be doggoning you couldn't be doggoning they couldn't be doggoning
Perfect
I couldn't have doggoned you couldn't have doggoned he couldn't have doggoned we couldn't have doggoned you couldn't have doggoned they couldn't have doggoned
V-ing perfect
I couldn't have been doggoning you couldn't have been doggoning he couldn't have been doggoning we couldn't have been doggoning you couldn't have been doggoning they couldn't have been doggoning
Interrogative form
Simple form
could I doggone? could you doggone? could he doggone? could we doggone? could you doggone? could they doggone?
V-ing form
could I be doggoning? could you be doggoning? could he be doggoning? could we be doggoning? could you be doggoning? could they be doggoning?
Perfect
could I have doggoned? could you have doggoned? could he have doggoned? could we have doggoned? could you have doggoned? could they have doggoned?
V-ing perfect
could I have been doggoning? could you have been doggoning? could he have been doggoning? could we have been doggoning? could you have been doggoning? could they have been doggoning?
Interro-negative form
Simple form
couldn't I doggone? couldn't you doggone? couldn't he doggone? couldn't we doggone? couldn't you doggone? couldn't they doggone?
V-ing form
couldn't I be doggoning? couldn't you be doggoning? couldn't he be doggoning? couldn't we be doggoning? couldn't you be doggoning? couldn't they be doggoning?
Perfect
couldn't I have doggoned? couldn't you have doggoned? couldn't he have doggoned? couldn't we have doggoned? couldn't you have doggoned? couldn't they have doggoned?
V-ing perfect
couldn't I have been doggoning? couldn't you have been doggoning? couldn't he have been doggoning? couldn't we have been doggoning? couldn't you have been doggoning? couldn't they have been doggoning?