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