English verb conjugation
CAN PUNCTURE

Regular verb: puncture - punctured - punctured

Affirmation

Simple form	V-ing form
I can puncture you can puncture she can puncture we can puncture you can puncture they can puncture	I can be puncturing you can be puncturing she 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 she 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 she 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 can't puncture you can't puncture she can't puncture we can't puncture you can't puncture they can't puncture	I can't be puncturing you can't be puncturing she can't be puncturing we can't be puncturing you can't be puncturing they can't be puncturing
Perfect	V-ing perfect
I can't have punctured you can't have punctured she can't have punctured we can't have punctured you can't have punctured they can't have punctured	I can't have been puncturing you can't have been puncturing she can't have been puncturing we can't have been puncturing you can't have been puncturing they can't have been puncturing

Interrogative form

Simple form	V-ing form
can I puncture? can you puncture? can she puncture? can we puncture? can you puncture? can they puncture?	can I be puncturing? can you be puncturing? can she 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 she 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 she 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't I puncture? can't you puncture? can't she puncture? can't we puncture? can't you puncture? can't they puncture?	can't I be puncturing? can't you be puncturing? can't she be puncturing? can't we be puncturing? can't you be puncturing? can't they be puncturing?
Perfect	V-ing perfect
can't I have punctured? can't you have punctured? can't she have punctured? can't we have punctured? can't you have punctured? can't they have punctured?	can't I have been puncturing? can't you have been puncturing? can't she have been puncturing? can't we have been puncturing? can't you have been puncturing? can't they have been puncturing?