I can border you can border he can border we can border you can border they can border
V-ing form
I can be bordering you can be bordering he can be bordering we can be bordering you can be bordering they can be bordering
Perfect
I can have bordered you can have bordered he can have bordered we can have bordered you can have bordered they can have bordered
V-ing perfect
I can have been bordering you can have been bordering he can have been bordering we can have been bordering you can have been bordering they can have been bordering
Negation
Simple form
I can't border you can't border he can't border we can't border you can't border they can't border
V-ing form
I can't be bordering you can't be bordering he can't be bordering we can't be bordering you can't be bordering they can't be bordering
Perfect
I can't have bordered you can't have bordered he can't have bordered we can't have bordered you can't have bordered they can't have bordered
V-ing perfect
I can't have been bordering you can't have been bordering he can't have been bordering we can't have been bordering you can't have been bordering they can't have been bordering
Interrogative form
Simple form
can I border? can you border? can he border? can we border? can you border? can they border?
V-ing form
can I be bordering? can you be bordering? can he be bordering? can we be bordering? can you be bordering? can they be bordering?
Perfect
can I have bordered? can you have bordered? can he have bordered? can we have bordered? can you have bordered? can they have bordered?
V-ing perfect
can I have been bordering? can you have been bordering? can he have been bordering? can we have been bordering? can you have been bordering? can they have been bordering?
Interro-negative form
Simple form
can't I border? can't you border? can't he border? can't we border? can't you border? can't they border?
V-ing form
can't I be bordering? can't you be bordering? can't he be bordering? can't we be bordering? can't you be bordering? can't they be bordering?
Perfect
can't I have bordered? can't you have bordered? can't he have bordered? can't we have bordered? can't you have bordered? can't they have bordered?
V-ing perfect
can't I have been bordering? can't you have been bordering? can't he have been bordering? can't we have been bordering? can't you have been bordering? can't they have been bordering?