English verb conjugation
CAN PUNCTURE

Regular verb: puncture - punctured - punctured

Affirmation

Simple form	V-ing form
I can puncture you can puncture he can puncture we can puncture you can puncture they can puncture	I can be puncturing you can be puncturing he can be puncturing we can be puncturing you can be puncturing they can be puncturing
Perfect	V-ing perfect
I can have punctured you can have punctured he can have punctured we can have punctured you can have punctured they can have punctured	I can have been puncturing you can have been puncturing he can have been puncturing we can have been puncturing you can have been puncturing they can have been puncturing

Negation

Simple form	V-ing form
I cannot puncture you cannot puncture he cannot puncture we cannot puncture you cannot puncture they cannot puncture	I cannot be puncturing you cannot be puncturing he cannot be puncturing we cannot be puncturing you cannot be puncturing they cannot be puncturing
Perfect	V-ing perfect
I cannot have punctured you cannot have punctured he cannot have punctured we cannot have punctured you cannot have punctured they cannot have punctured	I cannot have been puncturing you cannot have been puncturing he cannot have been puncturing we cannot have been puncturing you cannot have been puncturing they cannot have been puncturing

Interrogative form

Simple form	V-ing form
can I puncture? can you puncture? can he puncture? can we puncture? can you puncture? can they puncture?	can I be puncturing? can you be puncturing? can he be puncturing? can we be puncturing? can you be puncturing? can they be puncturing?
Perfect	V-ing perfect
can I have punctured? can you have punctured? can he have punctured? can we have punctured? can you have punctured? can they have punctured?	can I have been puncturing? can you have been puncturing? can he have been puncturing? can we have been puncturing? can you have been puncturing? can they have been puncturing?

Interro-negative form

Simple form	V-ing form
can I not puncture? can you not puncture? can he not puncture? can we not puncture? can you not puncture? can they not puncture?	can I not be puncturing? can you not be puncturing? can he not be puncturing? can we not be puncturing? can you not be puncturing? can they not be puncturing?
Perfect	V-ing perfect
can I not have punctured? can you not have punctured? can he not have punctured? can we not have punctured? can you not have punctured? can they not have punctured?	can I not have been puncturing? can you not have been puncturing? can he not have been puncturing? can we not have been puncturing? can you not have been puncturing? can they not have been puncturing?