I can scour you can scour he can scour we can scour you can scour they can scour
V-ing form
I can be scouring you can be scouring he can be scouring we can be scouring you can be scouring they can be scouring
Perfect
I can have scoured you can have scoured he can have scoured we can have scoured you can have scoured they can have scoured
V-ing perfect
I can have been scouring you can have been scouring he can have been scouring we can have been scouring you can have been scouring they can have been scouring
Negation
Simple form
I can't scour you can't scour he can't scour we can't scour you can't scour they can't scour
V-ing form
I can't be scouring you can't be scouring he can't be scouring we can't be scouring you can't be scouring they can't be scouring
Perfect
I can't have scoured you can't have scoured he can't have scoured we can't have scoured you can't have scoured they can't have scoured
V-ing perfect
I can't have been scouring you can't have been scouring he can't have been scouring we can't have been scouring you can't have been scouring they can't have been scouring
Interrogative form
Simple form
can I scour? can you scour? can he scour? can we scour? can you scour? can they scour?
V-ing form
can I be scouring? can you be scouring? can he be scouring? can we be scouring? can you be scouring? can they be scouring?
Perfect
can I have scoured? can you have scoured? can he have scoured? can we have scoured? can you have scoured? can they have scoured?
V-ing perfect
can I have been scouring? can you have been scouring? can he have been scouring? can we have been scouring? can you have been scouring? can they have been scouring?
Interro-negative form
Simple form
can't I scour? can't you scour? can't he scour? can't we scour? can't you scour? can't they scour?
V-ing form
can't I be scouring? can't you be scouring? can't he be scouring? can't we be scouring? can't you be scouring? can't they be scouring?
Perfect
can't I have scoured? can't you have scoured? can't he have scoured? can't we have scoured? can't you have scoured? can't they have scoured?
V-ing perfect
can't I have been scouring? can't you have been scouring? can't he have been scouring? can't we have been scouring? can't you have been scouring? can't they have been scouring?