I can loosen you can loosen he can loosen we can loosen you can loosen they can loosen
V-ing form
I can be loosening you can be loosening he can be loosening we can be loosening you can be loosening they can be loosening
Perfect
I can have loosened you can have loosened he can have loosened we can have loosened you can have loosened they can have loosened
V-ing perfect
I can have been loosening you can have been loosening he can have been loosening we can have been loosening you can have been loosening they can have been loosening
Negation
Simple form
I cannot loosen you cannot loosen he cannot loosen we cannot loosen you cannot loosen they cannot loosen
V-ing form
I cannot be loosening you cannot be loosening he cannot be loosening we cannot be loosening you cannot be loosening they cannot be loosening
Perfect
I cannot have loosened you cannot have loosened he cannot have loosened we cannot have loosened you cannot have loosened they cannot have loosened
V-ing perfect
I cannot have been loosening you cannot have been loosening he cannot have been loosening we cannot have been loosening you cannot have been loosening they cannot have been loosening
Interrogative form
Simple form
can I loosen? can you loosen? can he loosen? can we loosen? can you loosen? can they loosen?
V-ing form
can I be loosening? can you be loosening? can he be loosening? can we be loosening? can you be loosening? can they be loosening?
Perfect
can I have loosened? can you have loosened? can he have loosened? can we have loosened? can you have loosened? can they have loosened?
V-ing perfect
can I have been loosening? can you have been loosening? can he have been loosening? can we have been loosening? can you have been loosening? can they have been loosening?
Interro-negative form
Simple form
can I not loosen? can you not loosen? can he not loosen? can we not loosen? can you not loosen? can they not loosen?
V-ing form
can I not be loosening? can you not be loosening? can he not be loosening? can we not be loosening? can you not be loosening? can they not be loosening?
Perfect
can I not have loosened? can you not have loosened? can he not have loosened? can we not have loosened? can you not have loosened? can they not have loosened?
V-ing perfect
can I not have been loosening? can you not have been loosening? can he not have been loosening? can we not have been loosening? can you not have been loosening? can they not have been loosening?