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