I can concede you can concede he can concede we can concede you can concede they can concede
V-ing form
I can be conceding you can be conceding he can be conceding we can be conceding you can be conceding they can be conceding
Perfect
I can have conceded you can have conceded he can have conceded we can have conceded you can have conceded they can have conceded
V-ing perfect
I can have been conceding you can have been conceding he can have been conceding we can have been conceding you can have been conceding they can have been conceding
Negation
Simple form
I cannot concede you cannot concede he cannot concede we cannot concede you cannot concede they cannot concede
V-ing form
I cannot be conceding you cannot be conceding he cannot be conceding we cannot be conceding you cannot be conceding they cannot be conceding
Perfect
I cannot have conceded you cannot have conceded he cannot have conceded we cannot have conceded you cannot have conceded they cannot have conceded
V-ing perfect
I cannot have been conceding you cannot have been conceding he cannot have been conceding we cannot have been conceding you cannot have been conceding they cannot have been conceding
Interrogative form
Simple form
can I concede? can you concede? can he concede? can we concede? can you concede? can they concede?
V-ing form
can I be conceding? can you be conceding? can he be conceding? can we be conceding? can you be conceding? can they be conceding?
Perfect
can I have conceded? can you have conceded? can he have conceded? can we have conceded? can you have conceded? can they have conceded?
V-ing perfect
can I have been conceding? can you have been conceding? can he have been conceding? can we have been conceding? can you have been conceding? can they have been conceding?
Interro-negative form
Simple form
can I not concede? can you not concede? can he not concede? can we not concede? can you not concede? can they not concede?
V-ing form
can I not be conceding? can you not be conceding? can he not be conceding? can we not be conceding? can you not be conceding? can they not be conceding?
Perfect
can I not have conceded? can you not have conceded? can he not have conceded? can we not have conceded? can you not have conceded? can they not have conceded?
V-ing perfect
can I not have been conceding? can you not have been conceding? can he not have been conceding? can we not have been conceding? can you not have been conceding? can they not have been conceding?