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