I can comfort you can comfort he can comfort we can comfort you can comfort they can comfort
V-ing form
I can be comforting you can be comforting he can be comforting we can be comforting you can be comforting they can be comforting
Perfect
I can have comforted you can have comforted he can have comforted we can have comforted you can have comforted they can have comforted
V-ing perfect
I can have been comforting you can have been comforting he can have been comforting we can have been comforting you can have been comforting they can have been comforting
Negation
Simple form
I can't comfort you can't comfort he can't comfort we can't comfort you can't comfort they can't comfort
V-ing form
I can't be comforting you can't be comforting he can't be comforting we can't be comforting you can't be comforting they can't be comforting
Perfect
I can't have comforted you can't have comforted he can't have comforted we can't have comforted you can't have comforted they can't have comforted
V-ing perfect
I can't have been comforting you can't have been comforting he can't have been comforting we can't have been comforting you can't have been comforting they can't have been comforting
Interrogative form
Simple form
can I comfort? can you comfort? can he comfort? can we comfort? can you comfort? can they comfort?
V-ing form
can I be comforting? can you be comforting? can he be comforting? can we be comforting? can you be comforting? can they be comforting?
Perfect
can I have comforted? can you have comforted? can he have comforted? can we have comforted? can you have comforted? can they have comforted?
V-ing perfect
can I have been comforting? can you have been comforting? can he have been comforting? can we have been comforting? can you have been comforting? can they have been comforting?
Interro-negative form
Simple form
can't I comfort? can't you comfort? can't he comfort? can't we comfort? can't you comfort? can't they comfort?
V-ing form
can't I be comforting? can't you be comforting? can't he be comforting? can't we be comforting? can't you be comforting? can't they be comforting?
Perfect
can't I have comforted? can't you have comforted? can't he have comforted? can't we have comforted? can't you have comforted? can't they have comforted?
V-ing perfect
can't I have been comforting? can't you have been comforting? can't he have been comforting? can't we have been comforting? can't you have been comforting? can't they have been comforting?