I can unhitch you can unhitch she can unhitch we can unhitch you can unhitch they can unhitch
V-ing form
I can be unhitching you can be unhitching she can be unhitching we can be unhitching you can be unhitching they can be unhitching
Perfect
I can have unhitched you can have unhitched she can have unhitched we can have unhitched you can have unhitched they can have unhitched
V-ing perfect
I can have been unhitching you can have been unhitching she can have been unhitching we can have been unhitching you can have been unhitching they can have been unhitching
Negation
Simple form
I can't unhitch you can't unhitch she can't unhitch we can't unhitch you can't unhitch they can't unhitch
V-ing form
I can't be unhitching you can't be unhitching she can't be unhitching we can't be unhitching you can't be unhitching they can't be unhitching
Perfect
I can't have unhitched you can't have unhitched she can't have unhitched we can't have unhitched you can't have unhitched they can't have unhitched
V-ing perfect
I can't have been unhitching you can't have been unhitching she can't have been unhitching we can't have been unhitching you can't have been unhitching they can't have been unhitching
Interrogative form
Simple form
can I unhitch? can you unhitch? can she unhitch? can we unhitch? can you unhitch? can they unhitch?
V-ing form
can I be unhitching? can you be unhitching? can she be unhitching? can we be unhitching? can you be unhitching? can they be unhitching?
Perfect
can I have unhitched? can you have unhitched? can she have unhitched? can we have unhitched? can you have unhitched? can they have unhitched?
V-ing perfect
can I have been unhitching? can you have been unhitching? can she have been unhitching? can we have been unhitching? can you have been unhitching? can they have been unhitching?
Interro-negative form
Simple form
can't I unhitch? can't you unhitch? can't she unhitch? can't we unhitch? can't you unhitch? can't they unhitch?
V-ing form
can't I be unhitching? can't you be unhitching? can't she be unhitching? can't we be unhitching? can't you be unhitching? can't they be unhitching?
Perfect
can't I have unhitched? can't you have unhitched? can't she have unhitched? can't we have unhitched? can't you have unhitched? can't they have unhitched?
V-ing perfect
can't I have been unhitching? can't you have been unhitching? can't she have been unhitching? can't we have been unhitching? can't you have been unhitching? can't they have been unhitching?