I can patch you can patch he can patch we can patch you can patch they can patch
V-ing form
I can be patching you can be patching he can be patching we can be patching you can be patching they can be patching
Perfect
I can have patched you can have patched he can have patched we can have patched you can have patched they can have patched
V-ing perfect
I can have been patching you can have been patching he can have been patching we can have been patching you can have been patching they can have been patching
Negation
Simple form
I can't patch you can't patch he can't patch we can't patch you can't patch they can't patch
V-ing form
I can't be patching you can't be patching he can't be patching we can't be patching you can't be patching they can't be patching
Perfect
I can't have patched you can't have patched he can't have patched we can't have patched you can't have patched they can't have patched
V-ing perfect
I can't have been patching you can't have been patching he can't have been patching we can't have been patching you can't have been patching they can't have been patching
Interrogative form
Simple form
can I patch? can you patch? can he patch? can we patch? can you patch? can they patch?
V-ing form
can I be patching? can you be patching? can he be patching? can we be patching? can you be patching? can they be patching?
Perfect
can I have patched? can you have patched? can he have patched? can we have patched? can you have patched? can they have patched?
V-ing perfect
can I have been patching? can you have been patching? can he have been patching? can we have been patching? can you have been patching? can they have been patching?
Interro-negative form
Simple form
can't I patch? can't you patch? can't he patch? can't we patch? can't you patch? can't they patch?
V-ing form
can't I be patching? can't you be patching? can't he be patching? can't we be patching? can't you be patching? can't they be patching?
Perfect
can't I have patched? can't you have patched? can't he have patched? can't we have patched? can't you have patched? can't they have patched?
V-ing perfect
can't I have been patching? can't you have been patching? can't he have been patching? can't we have been patching? can't you have been patching? can't they have been patching?