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 can't concede you can't concede he can't concede we can't concede you can't concede they can't concede
V-ing form
I can't be conceding you can't be conceding he can't be conceding we can't be conceding you can't be conceding they can't be conceding
Perfect
I can't have conceded you can't have conceded he can't have conceded we can't have conceded you can't have conceded they can't have conceded
V-ing perfect
I can't have been conceding you can't have been conceding he can't have been conceding we can't have been conceding you can't have been conceding they can't 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't I concede? can't you concede? can't he concede? can't we concede? can't you concede? can't they concede?
V-ing form
can't I be conceding? can't you be conceding? can't he be conceding? can't we be conceding? can't you be conceding? can't they be conceding?
Perfect
can't I have conceded? can't you have conceded? can't he have conceded? can't we have conceded? can't you have conceded? can't they have conceded?
V-ing perfect
can't I have been conceding? can't you have been conceding? can't he have been conceding? can't we have been conceding? can't you have been conceding? can't they have been conceding?