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