I could debate you could debate she could debate we could debate you could debate they could debate
V-ing form
I could be debating you could be debating she could be debating we could be debating you could be debating they could be debating
Perfect
I could have debated you could have debated she could have debated we could have debated you could have debated they could have debated
V-ing perfect
I could have been debating you could have been debating she could have been debating we could have been debating you could have been debating they could have been debating
Negation
Simple form
I could not debate you could not debate she could not debate we could not debate you could not debate they could not debate
V-ing form
I could not be debating you could not be debating she could not be debating we could not be debating you could not be debating they could not be debating
Perfect
I could not have debated you could not have debated she could not have debated we could not have debated you could not have debated they could not have debated
V-ing perfect
I could not have been debating you could not have been debating she could not have been debating we could not have been debating you could not have been debating they could not have been debating
Interrogative form
Simple form
could I debate? could you debate? could she debate? could we debate? could you debate? could they debate?
V-ing form
could I be debating? could you be debating? could she be debating? could we be debating? could you be debating? could they be debating?
Perfect
could I have debated? could you have debated? could she have debated? could we have debated? could you have debated? could they have debated?
V-ing perfect
could I have been debating? could you have been debating? could she have been debating? could we have been debating? could you have been debating? could they have been debating?
Interro-negative form
Simple form
could I not debate? could you not debate? could she not debate? could we not debate? could you not debate? could they not debate?
V-ing form
could I not be debating? could you not be debating? could she not be debating? could we not be debating? could you not be debating? could they not be debating?
Perfect
could I not have debated? could you not have debated? could she not have debated? could we not have debated? could you not have debated? could they not have debated?
V-ing perfect
could I not have been debating? could you not have been debating? could she not have been debating? could we not have been debating? could you not have been debating? could they not have been debating?