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