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 can't puncture you can't puncture he 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 he 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 he 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 he 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 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't I puncture? can't you puncture? can't he 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 he 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 he 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 he have been puncturing? can't we have been puncturing? can't you have been puncturing? can't they have been puncturing?