I could detract you could detract he could detract we could detract you could detract they could detract
V-ing form
I could be detracting you could be detracting he could be detracting we could be detracting you could be detracting they could be detracting
Perfect
I could have detracted you could have detracted he could have detracted we could have detracted you could have detracted they could have detracted
V-ing perfect
I could have been detracting you could have been detracting he could have been detracting we could have been detracting you could have been detracting they could have been detracting
Negation
Simple form
I couldn't detract you couldn't detract he couldn't detract we couldn't detract you couldn't detract they couldn't detract
V-ing form
I couldn't be detracting you couldn't be detracting he couldn't be detracting we couldn't be detracting you couldn't be detracting they couldn't be detracting
Perfect
I couldn't have detracted you couldn't have detracted he couldn't have detracted we couldn't have detracted you couldn't have detracted they couldn't have detracted
V-ing perfect
I couldn't have been detracting you couldn't have been detracting he couldn't have been detracting we couldn't have been detracting you couldn't have been detracting they couldn't have been detracting
Interrogative form
Simple form
could I detract? could you detract? could he detract? could we detract? could you detract? could they detract?
V-ing form
could I be detracting? could you be detracting? could he be detracting? could we be detracting? could you be detracting? could they be detracting?
Perfect
could I have detracted? could you have detracted? could he have detracted? could we have detracted? could you have detracted? could they have detracted?
V-ing perfect
could I have been detracting? could you have been detracting? could he have been detracting? could we have been detracting? could you have been detracting? could they have been detracting?
Interro-negative form
Simple form
couldn't I detract? couldn't you detract? couldn't he detract? couldn't we detract? couldn't you detract? couldn't they detract?
V-ing form
couldn't I be detracting? couldn't you be detracting? couldn't he be detracting? couldn't we be detracting? couldn't you be detracting? couldn't they be detracting?
Perfect
couldn't I have detracted? couldn't you have detracted? couldn't he have detracted? couldn't we have detracted? couldn't you have detracted? couldn't they have detracted?
V-ing perfect
couldn't I have been detracting? couldn't you have been detracting? couldn't he have been detracting? couldn't we have been detracting? couldn't you have been detracting? couldn't they have been detracting?