I can trample you can trample he can trample we can trample you can trample they can trample
V-ing form
I can be trampling you can be trampling he can be trampling we can be trampling you can be trampling they can be trampling
Perfect
I can have trampled you can have trampled he can have trampled we can have trampled you can have trampled they can have trampled
V-ing perfect
I can have been trampling you can have been trampling he can have been trampling we can have been trampling you can have been trampling they can have been trampling
Negation
Simple form
I can't trample you can't trample he can't trample we can't trample you can't trample they can't trample
V-ing form
I can't be trampling you can't be trampling he can't be trampling we can't be trampling you can't be trampling they can't be trampling
Perfect
I can't have trampled you can't have trampled he can't have trampled we can't have trampled you can't have trampled they can't have trampled
V-ing perfect
I can't have been trampling you can't have been trampling he can't have been trampling we can't have been trampling you can't have been trampling they can't have been trampling
Interrogative form
Simple form
can I trample? can you trample? can he trample? can we trample? can you trample? can they trample?
V-ing form
can I be trampling? can you be trampling? can he be trampling? can we be trampling? can you be trampling? can they be trampling?
Perfect
can I have trampled? can you have trampled? can he have trampled? can we have trampled? can you have trampled? can they have trampled?
V-ing perfect
can I have been trampling? can you have been trampling? can he have been trampling? can we have been trampling? can you have been trampling? can they have been trampling?
Interro-negative form
Simple form
can't I trample? can't you trample? can't he trample? can't we trample? can't you trample? can't they trample?
V-ing form
can't I be trampling? can't you be trampling? can't he be trampling? can't we be trampling? can't you be trampling? can't they be trampling?
Perfect
can't I have trampled? can't you have trampled? can't he have trampled? can't we have trampled? can't you have trampled? can't they have trampled?
V-ing perfect
can't I have been trampling? can't you have been trampling? can't he have been trampling? can't we have been trampling? can't you have been trampling? can't they have been trampling?