I can pinch you can pinch she can pinch we can pinch you can pinch they can pinch
V-ing form
I can be pinching you can be pinching she can be pinching we can be pinching you can be pinching they can be pinching
Perfect
I can have pinched you can have pinched she can have pinched we can have pinched you can have pinched they can have pinched
V-ing perfect
I can have been pinching you can have been pinching she can have been pinching we can have been pinching you can have been pinching they can have been pinching
Negation
Simple form
I can't pinch you can't pinch she can't pinch we can't pinch you can't pinch they can't pinch
V-ing form
I can't be pinching you can't be pinching she can't be pinching we can't be pinching you can't be pinching they can't be pinching
Perfect
I can't have pinched you can't have pinched she can't have pinched we can't have pinched you can't have pinched they can't have pinched
V-ing perfect
I can't have been pinching you can't have been pinching she can't have been pinching we can't have been pinching you can't have been pinching they can't have been pinching
Interrogative form
Simple form
can I pinch? can you pinch? can she pinch? can we pinch? can you pinch? can they pinch?
V-ing form
can I be pinching? can you be pinching? can she be pinching? can we be pinching? can you be pinching? can they be pinching?
Perfect
can I have pinched? can you have pinched? can she have pinched? can we have pinched? can you have pinched? can they have pinched?
V-ing perfect
can I have been pinching? can you have been pinching? can she have been pinching? can we have been pinching? can you have been pinching? can they have been pinching?
Interro-negative form
Simple form
can't I pinch? can't you pinch? can't she pinch? can't we pinch? can't you pinch? can't they pinch?
V-ing form
can't I be pinching? can't you be pinching? can't she be pinching? can't we be pinching? can't you be pinching? can't they be pinching?
Perfect
can't I have pinched? can't you have pinched? can't she have pinched? can't we have pinched? can't you have pinched? can't they have pinched?
V-ing perfect
can't I have been pinching? can't you have been pinching? can't she have been pinching? can't we have been pinching? can't you have been pinching? can't they have been pinching?