I could occlude you could occlude he could occlude we could occlude you could occlude they could occlude
V-ing form
I could be occluding you could be occluding he could be occluding we could be occluding you could be occluding they could be occluding
Perfect
I could have occluded you could have occluded he could have occluded we could have occluded you could have occluded they could have occluded
V-ing perfect
I could have been occluding you could have been occluding he could have been occluding we could have been occluding you could have been occluding they could have been occluding
Negation
Simple form
I could not occlude you could not occlude he could not occlude we could not occlude you could not occlude they could not occlude
V-ing form
I could not be occluding you could not be occluding he could not be occluding we could not be occluding you could not be occluding they could not be occluding
Perfect
I could not have occluded you could not have occluded he could not have occluded we could not have occluded you could not have occluded they could not have occluded
V-ing perfect
I could not have been occluding you could not have been occluding he could not have been occluding we could not have been occluding you could not have been occluding they could not have been occluding
Interrogative form
Simple form
could I occlude? could you occlude? could he occlude? could we occlude? could you occlude? could they occlude?
V-ing form
could I be occluding? could you be occluding? could he be occluding? could we be occluding? could you be occluding? could they be occluding?
Perfect
could I have occluded? could you have occluded? could he have occluded? could we have occluded? could you have occluded? could they have occluded?
V-ing perfect
could I have been occluding? could you have been occluding? could he have been occluding? could we have been occluding? could you have been occluding? could they have been occluding?
Interro-negative form
Simple form
could I not occlude? could you not occlude? could he not occlude? could we not occlude? could you not occlude? could they not occlude?
V-ing form
could I not be occluding? could you not be occluding? could he not be occluding? could we not be occluding? could you not be occluding? could they not be occluding?
Perfect
could I not have occluded? could you not have occluded? could he not have occluded? could we not have occluded? could you not have occluded? could they not have occluded?
V-ing perfect
could I not have been occluding? could you not have been occluding? could he not have been occluding? could we not have been occluding? could you not have been occluding? could they not have been occluding?