I can restrict you can restrict he can restrict we can restrict you can restrict they can restrict
V-ing form
I can be restricting you can be restricting he can be restricting we can be restricting you can be restricting they can be restricting
Perfect
I can have restricted you can have restricted he can have restricted we can have restricted you can have restricted they can have restricted
V-ing perfect
I can have been restricting you can have been restricting he can have been restricting we can have been restricting you can have been restricting they can have been restricting
Negation
Simple form
I can't restrict you can't restrict he can't restrict we can't restrict you can't restrict they can't restrict
V-ing form
I can't be restricting you can't be restricting he can't be restricting we can't be restricting you can't be restricting they can't be restricting
Perfect
I can't have restricted you can't have restricted he can't have restricted we can't have restricted you can't have restricted they can't have restricted
V-ing perfect
I can't have been restricting you can't have been restricting he can't have been restricting we can't have been restricting you can't have been restricting they can't have been restricting
Interrogative form
Simple form
can I restrict? can you restrict? can he restrict? can we restrict? can you restrict? can they restrict?
V-ing form
can I be restricting? can you be restricting? can he be restricting? can we be restricting? can you be restricting? can they be restricting?
Perfect
can I have restricted? can you have restricted? can he have restricted? can we have restricted? can you have restricted? can they have restricted?
V-ing perfect
can I have been restricting? can you have been restricting? can he have been restricting? can we have been restricting? can you have been restricting? can they have been restricting?
Interro-negative form
Simple form
can't I restrict? can't you restrict? can't he restrict? can't we restrict? can't you restrict? can't they restrict?
V-ing form
can't I be restricting? can't you be restricting? can't he be restricting? can't we be restricting? can't you be restricting? can't they be restricting?
Perfect
can't I have restricted? can't you have restricted? can't he have restricted? can't we have restricted? can't you have restricted? can't they have restricted?
V-ing perfect
can't I have been restricting? can't you have been restricting? can't he have been restricting? can't we have been restricting? can't you have been restricting? can't they have been restricting?