I can drag you can drag he can drag we can drag you can drag they can drag
V-ing form
I can be dragging you can be dragging he can be dragging we can be dragging you can be dragging they can be dragging
Perfect
I can have dragged you can have dragged he can have dragged we can have dragged you can have dragged they can have dragged
V-ing perfect
I can have been dragging you can have been dragging he can have been dragging we can have been dragging you can have been dragging they can have been dragging
Negation
Simple form
I can't drag you can't drag he can't drag we can't drag you can't drag they can't drag
V-ing form
I can't be dragging you can't be dragging he can't be dragging we can't be dragging you can't be dragging they can't be dragging
Perfect
I can't have dragged you can't have dragged he can't have dragged we can't have dragged you can't have dragged they can't have dragged
V-ing perfect
I can't have been dragging you can't have been dragging he can't have been dragging we can't have been dragging you can't have been dragging they can't have been dragging
Interrogative form
Simple form
can I drag? can you drag? can he drag? can we drag? can you drag? can they drag?
V-ing form
can I be dragging? can you be dragging? can he be dragging? can we be dragging? can you be dragging? can they be dragging?
Perfect
can I have dragged? can you have dragged? can he have dragged? can we have dragged? can you have dragged? can they have dragged?
V-ing perfect
can I have been dragging? can you have been dragging? can he have been dragging? can we have been dragging? can you have been dragging? can they have been dragging?
Interro-negative form
Simple form
can't I drag? can't you drag? can't he drag? can't we drag? can't you drag? can't they drag?
V-ing form
can't I be dragging? can't you be dragging? can't he be dragging? can't we be dragging? can't you be dragging? can't they be dragging?
Perfect
can't I have dragged? can't you have dragged? can't he have dragged? can't we have dragged? can't you have dragged? can't they have dragged?
V-ing perfect
can't I have been dragging? can't you have been dragging? can't he have been dragging? can't we have been dragging? can't you have been dragging? can't they have been dragging?