I could field you could field he could field we could field you could field they could field
V-ing form
I could be fielding you could be fielding he could be fielding we could be fielding you could be fielding they could be fielding
Perfect
I could have fielded you could have fielded he could have fielded we could have fielded you could have fielded they could have fielded
V-ing perfect
I could have been fielding you could have been fielding he could have been fielding we could have been fielding you could have been fielding they could have been fielding
Negation
Simple form
I could not field you could not field he could not field we could not field you could not field they could not field
V-ing form
I could not be fielding you could not be fielding he could not be fielding we could not be fielding you could not be fielding they could not be fielding
Perfect
I could not have fielded you could not have fielded he could not have fielded we could not have fielded you could not have fielded they could not have fielded
V-ing perfect
I could not have been fielding you could not have been fielding he could not have been fielding we could not have been fielding you could not have been fielding they could not have been fielding
Interrogative form
Simple form
could I field? could you field? could he field? could we field? could you field? could they field?
V-ing form
could I be fielding? could you be fielding? could he be fielding? could we be fielding? could you be fielding? could they be fielding?
Perfect
could I have fielded? could you have fielded? could he have fielded? could we have fielded? could you have fielded? could they have fielded?
V-ing perfect
could I have been fielding? could you have been fielding? could he have been fielding? could we have been fielding? could you have been fielding? could they have been fielding?
Interro-negative form
Simple form
could I not field? could you not field? could he not field? could we not field? could you not field? could they not field?
V-ing form
could I not be fielding? could you not be fielding? could he not be fielding? could we not be fielding? could you not be fielding? could they not be fielding?
Perfect
could I not have fielded? could you not have fielded? could he not have fielded? could we not have fielded? could you not have fielded? could they not have fielded?
V-ing perfect
could I not have been fielding? could you not have been fielding? could he not have been fielding? could we not have been fielding? could you not have been fielding? could they not have been fielding?