I can blur you can blur he can blur we can blur you can blur they can blur
V-ing form
I can be blurring you can be blurring he can be blurring we can be blurring you can be blurring they can be blurring
Perfect
I can have blurred you can have blurred he can have blurred we can have blurred you can have blurred they can have blurred
V-ing perfect
I can have been blurring you can have been blurring he can have been blurring we can have been blurring you can have been blurring they can have been blurring
Negation
Simple form
I can't blur you can't blur he can't blur we can't blur you can't blur they can't blur
V-ing form
I can't be blurring you can't be blurring he can't be blurring we can't be blurring you can't be blurring they can't be blurring
Perfect
I can't have blurred you can't have blurred he can't have blurred we can't have blurred you can't have blurred they can't have blurred
V-ing perfect
I can't have been blurring you can't have been blurring he can't have been blurring we can't have been blurring you can't have been blurring they can't have been blurring
Interrogative form
Simple form
can I blur? can you blur? can he blur? can we blur? can you blur? can they blur?
V-ing form
can I be blurring? can you be blurring? can he be blurring? can we be blurring? can you be blurring? can they be blurring?
Perfect
can I have blurred? can you have blurred? can he have blurred? can we have blurred? can you have blurred? can they have blurred?
V-ing perfect
can I have been blurring? can you have been blurring? can he have been blurring? can we have been blurring? can you have been blurring? can they have been blurring?
Interro-negative form
Simple form
can't I blur? can't you blur? can't he blur? can't we blur? can't you blur? can't they blur?
V-ing form
can't I be blurring? can't you be blurring? can't he be blurring? can't we be blurring? can't you be blurring? can't they be blurring?
Perfect
can't I have blurred? can't you have blurred? can't he have blurred? can't we have blurred? can't you have blurred? can't they have blurred?
V-ing perfect
can't I have been blurring? can't you have been blurring? can't he have been blurring? can't we have been blurring? can't you have been blurring? can't they have been blurring?