I could abate you could abate she could abate we could abate you could abate they could abate
V-ing form
I could be abating you could be abating she could be abating we could be abating you could be abating they could be abating
Perfect
I could have abated you could have abated she could have abated we could have abated you could have abated they could have abated
V-ing perfect
I could have been abating you could have been abating she could have been abating we could have been abating you could have been abating they could have been abating
Negation
Simple form
I could not abate you could not abate she could not abate we could not abate you could not abate they could not abate
V-ing form
I could not be abating you could not be abating she could not be abating we could not be abating you could not be abating they could not be abating
Perfect
I could not have abated you could not have abated she could not have abated we could not have abated you could not have abated they could not have abated
V-ing perfect
I could not have been abating you could not have been abating she could not have been abating we could not have been abating you could not have been abating they could not have been abating
Interrogative form
Simple form
could I abate? could you abate? could she abate? could we abate? could you abate? could they abate?
V-ing form
could I be abating? could you be abating? could she be abating? could we be abating? could you be abating? could they be abating?
Perfect
could I have abated? could you have abated? could she have abated? could we have abated? could you have abated? could they have abated?
V-ing perfect
could I have been abating? could you have been abating? could she have been abating? could we have been abating? could you have been abating? could they have been abating?
Interro-negative form
Simple form
could I not abate? could you not abate? could she not abate? could we not abate? could you not abate? could they not abate?
V-ing form
could I not be abating? could you not be abating? could she not be abating? could we not be abating? could you not be abating? could they not be abating?
Perfect
could I not have abated? could you not have abated? could she not have abated? could we not have abated? could you not have abated? could they not have abated?
V-ing perfect
could I not have been abating? could you not have been abating? could she not have been abating? could we not have been abating? could you not have been abating? could they not have been abating?