I can prod you can prod she can prod we can prod you can prod they can prod
V-ing form
I can be prodding you can be prodding she can be prodding we can be prodding you can be prodding they can be prodding
Perfect
I can have prodded you can have prodded she 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 she can have been prodding we can have been prodding you can have been prodding they can have been prodding
Negation
Simple form
I can't prod you can't prod she can't prod we can't prod you can't prod they can't prod
V-ing form
I can't be prodding you can't be prodding she can't be prodding we can't be prodding you can't be prodding they can't be prodding
Perfect
I can't have prodded you can't have prodded she can't have prodded we can't have prodded you can't have prodded they can't have prodded
V-ing perfect
I can't have been prodding you can't have been prodding she can't have been prodding we can't have been prodding you can't have been prodding they can't have been prodding
Interrogative form
Simple form
can I prod? can you prod? can she prod? can we prod? can you prod? can they prod?
V-ing form
can I be prodding? can you be prodding? can she be prodding? can we be prodding? can you be prodding? can they be prodding?
Perfect
can I have prodded? can you have prodded? can she 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 she have been prodding? can we have been prodding? can you have been prodding? can they have been prodding?
Interro-negative form
Simple form
can't I prod? can't you prod? can't she prod? can't we prod? can't you prod? can't they prod?
V-ing form
can't I be prodding? can't you be prodding? can't she be prodding? can't we be prodding? can't you be prodding? can't they be prodding?
Perfect
can't I have prodded? can't you have prodded? can't she have prodded? can't we have prodded? can't you have prodded? can't they have prodded?
V-ing perfect
can't I have been prodding? can't you have been prodding? can't she have been prodding? can't we have been prodding? can't you have been prodding? can't they have been prodding?