I can prowl you can prowl he can prowl we can prowl you can prowl they can prowl
V-ing form
I can be prowling you can be prowling he can be prowling we can be prowling you can be prowling they can be prowling
Perfect
I can have prowled you can have prowled he can have prowled we can have prowled you can have prowled they can have prowled
V-ing perfect
I can have been prowling you can have been prowling he can have been prowling we can have been prowling you can have been prowling they can have been prowling
Negation
Simple form
I can't prowl you can't prowl he can't prowl we can't prowl you can't prowl they can't prowl
V-ing form
I can't be prowling you can't be prowling he can't be prowling we can't be prowling you can't be prowling they can't be prowling
Perfect
I can't have prowled you can't have prowled he can't have prowled we can't have prowled you can't have prowled they can't have prowled
V-ing perfect
I can't have been prowling you can't have been prowling he can't have been prowling we can't have been prowling you can't have been prowling they can't have been prowling
Interrogative form
Simple form
can I prowl? can you prowl? can he prowl? can we prowl? can you prowl? can they prowl?
V-ing form
can I be prowling? can you be prowling? can he be prowling? can we be prowling? can you be prowling? can they be prowling?
Perfect
can I have prowled? can you have prowled? can he have prowled? can we have prowled? can you have prowled? can they have prowled?
V-ing perfect
can I have been prowling? can you have been prowling? can he have been prowling? can we have been prowling? can you have been prowling? can they have been prowling?
Interro-negative form
Simple form
can't I prowl? can't you prowl? can't he prowl? can't we prowl? can't you prowl? can't they prowl?
V-ing form
can't I be prowling? can't you be prowling? can't he be prowling? can't we be prowling? can't you be prowling? can't they be prowling?
Perfect
can't I have prowled? can't you have prowled? can't he have prowled? can't we have prowled? can't you have prowled? can't they have prowled?
V-ing perfect
can't I have been prowling? can't you have been prowling? can't he have been prowling? can't we have been prowling? can't you have been prowling? can't they have been prowling?