I could altercate you could altercate she could altercate we could altercate you could altercate they could altercate
V-ing form
I could be altercating you could be altercating she could be altercating we could be altercating you could be altercating they could be altercating
Perfect
I could have altercated you could have altercated she could have altercated we could have altercated you could have altercated they could have altercated
V-ing perfect
I could have been altercating you could have been altercating she could have been altercating we could have been altercating you could have been altercating they could have been altercating
Negation
Simple form
I couldn't altercate you couldn't altercate she couldn't altercate we couldn't altercate you couldn't altercate they couldn't altercate
V-ing form
I couldn't be altercating you couldn't be altercating she couldn't be altercating we couldn't be altercating you couldn't be altercating they couldn't be altercating
Perfect
I couldn't have altercated you couldn't have altercated she couldn't have altercated we couldn't have altercated you couldn't have altercated they couldn't have altercated
V-ing perfect
I couldn't have been altercating you couldn't have been altercating she couldn't have been altercating we couldn't have been altercating you couldn't have been altercating they couldn't have been altercating
Interrogative form
Simple form
could I altercate? could you altercate? could she altercate? could we altercate? could you altercate? could they altercate?
V-ing form
could I be altercating? could you be altercating? could she be altercating? could we be altercating? could you be altercating? could they be altercating?
Perfect
could I have altercated? could you have altercated? could she have altercated? could we have altercated? could you have altercated? could they have altercated?
V-ing perfect
could I have been altercating? could you have been altercating? could she have been altercating? could we have been altercating? could you have been altercating? could they have been altercating?
Interro-negative form
Simple form
couldn't I altercate? couldn't you altercate? couldn't she altercate? couldn't we altercate? couldn't you altercate? couldn't they altercate?
V-ing form
couldn't I be altercating? couldn't you be altercating? couldn't she be altercating? couldn't we be altercating? couldn't you be altercating? couldn't they be altercating?
Perfect
couldn't I have altercated? couldn't you have altercated? couldn't she have altercated? couldn't we have altercated? couldn't you have altercated? couldn't they have altercated?
V-ing perfect
couldn't I have been altercating? couldn't you have been altercating? couldn't she have been altercating? couldn't we have been altercating? couldn't you have been altercating? couldn't they have been altercating?