I could root you could root he could root we could root you could root they could root
V-ing form
I could be rooting you could be rooting he could be rooting we could be rooting you could be rooting they could be rooting
Perfect
I could have rooted you could have rooted he could have rooted we could have rooted you could have rooted they could have rooted
V-ing perfect
I could have been rooting you could have been rooting he could have been rooting we could have been rooting you could have been rooting they could have been rooting
Negation
Simple form
I could not root you could not root he could not root we could not root you could not root they could not root
V-ing form
I could not be rooting you could not be rooting he could not be rooting we could not be rooting you could not be rooting they could not be rooting
Perfect
I could not have rooted you could not have rooted he could not have rooted we could not have rooted you could not have rooted they could not have rooted
V-ing perfect
I could not have been rooting you could not have been rooting he could not have been rooting we could not have been rooting you could not have been rooting they could not have been rooting
Interrogative form
Simple form
could I root? could you root? could he root? could we root? could you root? could they root?
V-ing form
could I be rooting? could you be rooting? could he be rooting? could we be rooting? could you be rooting? could they be rooting?
Perfect
could I have rooted? could you have rooted? could he have rooted? could we have rooted? could you have rooted? could they have rooted?
V-ing perfect
could I have been rooting? could you have been rooting? could he have been rooting? could we have been rooting? could you have been rooting? could they have been rooting?
Interro-negative form
Simple form
could I not root? could you not root? could he not root? could we not root? could you not root? could they not root?
V-ing form
could I not be rooting? could you not be rooting? could he not be rooting? could we not be rooting? could you not be rooting? could they not be rooting?
Perfect
could I not have rooted? could you not have rooted? could he not have rooted? could we not have rooted? could you not have rooted? could they not have rooted?
V-ing perfect
could I not have been rooting? could you not have been rooting? could he not have been rooting? could we not have been rooting? could you not have been rooting? could they not have been rooting?