I could approbate you could approbate she could approbate we could approbate you could approbate they could approbate
V-ing form
I could be approbating you could be approbating she could be approbating we could be approbating you could be approbating they could be approbating
Perfect
I could have approbated you could have approbated she could have approbated we could have approbated you could have approbated they could have approbated
V-ing perfect
I could have been approbating you could have been approbating she could have been approbating we could have been approbating you could have been approbating they could have been approbating
Negation
Simple form
I could not approbate you could not approbate she could not approbate we could not approbate you could not approbate they could not approbate
V-ing form
I could not be approbating you could not be approbating she could not be approbating we could not be approbating you could not be approbating they could not be approbating
Perfect
I could not have approbated you could not have approbated she could not have approbated we could not have approbated you could not have approbated they could not have approbated
V-ing perfect
I could not have been approbating you could not have been approbating she could not have been approbating we could not have been approbating you could not have been approbating they could not have been approbating
Interrogative form
Simple form
could I approbate? could you approbate? could she approbate? could we approbate? could you approbate? could they approbate?
V-ing form
could I be approbating? could you be approbating? could she be approbating? could we be approbating? could you be approbating? could they be approbating?
Perfect
could I have approbated? could you have approbated? could she have approbated? could we have approbated? could you have approbated? could they have approbated?
V-ing perfect
could I have been approbating? could you have been approbating? could she have been approbating? could we have been approbating? could you have been approbating? could they have been approbating?
Interro-negative form
Simple form
could I not approbate? could you not approbate? could she not approbate? could we not approbate? could you not approbate? could they not approbate?
V-ing form
could I not be approbating? could you not be approbating? could she not be approbating? could we not be approbating? could you not be approbating? could they not be approbating?
Perfect
could I not have approbated? could you not have approbated? could she not have approbated? could we not have approbated? could you not have approbated? could they not have approbated?
V-ing perfect
could I not have been approbating? could you not have been approbating? could she not have been approbating? could we not have been approbating? could you not have been approbating? could they not have been approbating?