I can pinch you can pinch he can pinch we can pinch you can pinch they can pinch
V-ing form
I can be pinching you can be pinching he can be pinching we can be pinching you can be pinching they can be pinching
Perfect
I can have pinched you can have pinched he 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 he can have been pinching we can have been pinching you can have been pinching they can have been pinching
Negation
Simple form
I cannot pinch you cannot pinch he cannot pinch we cannot pinch you cannot pinch they cannot pinch
V-ing form
I cannot be pinching you cannot be pinching he cannot be pinching we cannot be pinching you cannot be pinching they cannot be pinching
Perfect
I cannot have pinched you cannot have pinched he cannot have pinched we cannot have pinched you cannot have pinched they cannot have pinched
V-ing perfect
I cannot have been pinching you cannot have been pinching he cannot have been pinching we cannot have been pinching you cannot have been pinching they cannot have been pinching
Interrogative form
Simple form
can I pinch? can you pinch? can he pinch? can we pinch? can you pinch? can they pinch?
V-ing form
can I be pinching? can you be pinching? can he be pinching? can we be pinching? can you be pinching? can they be pinching?
Perfect
can I have pinched? can you have pinched? can he 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 he have been pinching? can we have been pinching? can you have been pinching? can they have been pinching?
Interro-negative form
Simple form
can I not pinch? can you not pinch? can he not pinch? can we not pinch? can you not pinch? can they not pinch?
V-ing form
can I not be pinching? can you not be pinching? can he not be pinching? can we not be pinching? can you not be pinching? can they not be pinching?
Perfect
can I not have pinched? can you not have pinched? can he not have pinched? can we not have pinched? can you not have pinched? can they not have pinched?
V-ing perfect
can I not have been pinching? can you not have been pinching? can he not have been pinching? can we not have been pinching? can you not have been pinching? can they not have been pinching?