I can perambulate you can perambulate he can perambulate we can perambulate you can perambulate they can perambulate
V-ing form
I can be perambulating you can be perambulating he can be perambulating we can be perambulating you can be perambulating they can be perambulating
Perfect
I can have perambulated you can have perambulated he can have perambulated we can have perambulated you can have perambulated they can have perambulated
V-ing perfect
I can have been perambulating you can have been perambulating he can have been perambulating we can have been perambulating you can have been perambulating they can have been perambulating
Negation
Simple form
I can't perambulate you can't perambulate he can't perambulate we can't perambulate you can't perambulate they can't perambulate
V-ing form
I can't be perambulating you can't be perambulating he can't be perambulating we can't be perambulating you can't be perambulating they can't be perambulating
Perfect
I can't have perambulated you can't have perambulated he can't have perambulated we can't have perambulated you can't have perambulated they can't have perambulated
V-ing perfect
I can't have been perambulating you can't have been perambulating he can't have been perambulating we can't have been perambulating you can't have been perambulating they can't have been perambulating
Interrogative form
Simple form
can I perambulate? can you perambulate? can he perambulate? can we perambulate? can you perambulate? can they perambulate?
V-ing form
can I be perambulating? can you be perambulating? can he be perambulating? can we be perambulating? can you be perambulating? can they be perambulating?
Perfect
can I have perambulated? can you have perambulated? can he have perambulated? can we have perambulated? can you have perambulated? can they have perambulated?
V-ing perfect
can I have been perambulating? can you have been perambulating? can he have been perambulating? can we have been perambulating? can you have been perambulating? can they have been perambulating?
Interro-negative form
Simple form
can't I perambulate? can't you perambulate? can't he perambulate? can't we perambulate? can't you perambulate? can't they perambulate?
V-ing form
can't I be perambulating? can't you be perambulating? can't he be perambulating? can't we be perambulating? can't you be perambulating? can't they be perambulating?
Perfect
can't I have perambulated? can't you have perambulated? can't he have perambulated? can't we have perambulated? can't you have perambulated? can't they have perambulated?
V-ing perfect
can't I have been perambulating? can't you have been perambulating? can't he have been perambulating? can't we have been perambulating? can't you have been perambulating? can't they have been perambulating?