I can plunge you can plunge he can plunge we can plunge you can plunge they can plunge
V-ing form
I can be plunging you can be plunging he can be plunging we can be plunging you can be plunging they can be plunging
Perfect
I can have plunged you can have plunged he can have plunged we can have plunged you can have plunged they can have plunged
V-ing perfect
I can have been plunging you can have been plunging he can have been plunging we can have been plunging you can have been plunging they can have been plunging
Negation
Simple form
I cannot plunge you cannot plunge he cannot plunge we cannot plunge you cannot plunge they cannot plunge
V-ing form
I cannot be plunging you cannot be plunging he cannot be plunging we cannot be plunging you cannot be plunging they cannot be plunging
Perfect
I cannot have plunged you cannot have plunged he cannot have plunged we cannot have plunged you cannot have plunged they cannot have plunged
V-ing perfect
I cannot have been plunging you cannot have been plunging he cannot have been plunging we cannot have been plunging you cannot have been plunging they cannot have been plunging
Interrogative form
Simple form
can I plunge? can you plunge? can he plunge? can we plunge? can you plunge? can they plunge?
V-ing form
can I be plunging? can you be plunging? can he be plunging? can we be plunging? can you be plunging? can they be plunging?
Perfect
can I have plunged? can you have plunged? can he have plunged? can we have plunged? can you have plunged? can they have plunged?
V-ing perfect
can I have been plunging? can you have been plunging? can he have been plunging? can we have been plunging? can you have been plunging? can they have been plunging?
Interro-negative form
Simple form
can I not plunge? can you not plunge? can he not plunge? can we not plunge? can you not plunge? can they not plunge?
V-ing form
can I not be plunging? can you not be plunging? can he not be plunging? can we not be plunging? can you not be plunging? can they not be plunging?
Perfect
can I not have plunged? can you not have plunged? can he not have plunged? can we not have plunged? can you not have plunged? can they not have plunged?
V-ing perfect
can I not have been plunging? can you not have been plunging? can he not have been plunging? can we not have been plunging? can you not have been plunging? can they not have been plunging?