I can isle you can isle he can isle we can isle you can isle they can isle
V-ing form
I can be isling you can be isling he can be isling we can be isling you can be isling they can be isling
Perfect
I can have isled you can have isled he can have isled we can have isled you can have isled they can have isled
V-ing perfect
I can have been isling you can have been isling he can have been isling we can have been isling you can have been isling they can have been isling
Negation
Simple form
I can't isle you can't isle he can't isle we can't isle you can't isle they can't isle
V-ing form
I can't be isling you can't be isling he can't be isling we can't be isling you can't be isling they can't be isling
Perfect
I can't have isled you can't have isled he can't have isled we can't have isled you can't have isled they can't have isled
V-ing perfect
I can't have been isling you can't have been isling he can't have been isling we can't have been isling you can't have been isling they can't have been isling
Interrogative form
Simple form
can I isle? can you isle? can he isle? can we isle? can you isle? can they isle?
V-ing form
can I be isling? can you be isling? can he be isling? can we be isling? can you be isling? can they be isling?
Perfect
can I have isled? can you have isled? can he have isled? can we have isled? can you have isled? can they have isled?
V-ing perfect
can I have been isling? can you have been isling? can he have been isling? can we have been isling? can you have been isling? can they have been isling?
Interro-negative form
Simple form
can't I isle? can't you isle? can't he isle? can't we isle? can't you isle? can't they isle?
V-ing form
can't I be isling? can't you be isling? can't he be isling? can't we be isling? can't you be isling? can't they be isling?
Perfect
can't I have isled? can't you have isled? can't he have isled? can't we have isled? can't you have isled? can't they have isled?
V-ing perfect
can't I have been isling? can't you have been isling? can't he have been isling? can't we have been isling? can't you have been isling? can't they have been isling?