I can prod you can prod he can prod we can prod you can prod they can prod
V-ing form
I can be prodding you can be prodding he can be prodding we can be prodding you can be prodding they can be prodding
Perfect
I can have prodded you can have prodded he can have prodded we can have prodded you can have prodded they can have prodded
V-ing perfect
I can have been prodding you can have been prodding he can have been prodding we can have been prodding you can have been prodding they can have been prodding
Negation
Simple form
I cannot prod you cannot prod he cannot prod we cannot prod you cannot prod they cannot prod
V-ing form
I cannot be prodding you cannot be prodding he cannot be prodding we cannot be prodding you cannot be prodding they cannot be prodding
Perfect
I cannot have prodded you cannot have prodded he cannot have prodded we cannot have prodded you cannot have prodded they cannot have prodded
V-ing perfect
I cannot have been prodding you cannot have been prodding he cannot have been prodding we cannot have been prodding you cannot have been prodding they cannot have been prodding
Interrogative form
Simple form
can I prod? can you prod? can he prod? can we prod? can you prod? can they prod?
V-ing form
can I be prodding? can you be prodding? can he be prodding? can we be prodding? can you be prodding? can they be prodding?
Perfect
can I have prodded? can you have prodded? can he have prodded? can we have prodded? can you have prodded? can they have prodded?
V-ing perfect
can I have been prodding? can you have been prodding? can he have been prodding? can we have been prodding? can you have been prodding? can they have been prodding?
Interro-negative form
Simple form
can I not prod? can you not prod? can he not prod? can we not prod? can you not prod? can they not prod?
V-ing form
can I not be prodding? can you not be prodding? can he not be prodding? can we not be prodding? can you not be prodding? can they not be prodding?
Perfect
can I not have prodded? can you not have prodded? can he not have prodded? can we not have prodded? can you not have prodded? can they not have prodded?
V-ing perfect
can I not have been prodding? can you not have been prodding? can he not have been prodding? can we not have been prodding? can you not have been prodding? can they not have been prodding?