English verb conjugation
CAN QUIZ

Regular verb: quiz - quizzed - quizzed

Affirmation

Simple form	V-ing form
I can quiz you can quiz he can quiz we can quiz you can quiz they can quiz	I can be quizzing you can be quizzing he can be quizzing we can be quizzing you can be quizzing they can be quizzing
Perfect	V-ing perfect
I can have quizzed you can have quizzed he can have quizzed we can have quizzed you can have quizzed they can have quizzed	I can have been quizzing you can have been quizzing he can have been quizzing we can have been quizzing you can have been quizzing they can have been quizzing

Negation

Simple form	V-ing form
I can't quiz you can't quiz he can't quiz we can't quiz you can't quiz they can't quiz	I can't be quizzing you can't be quizzing he can't be quizzing we can't be quizzing you can't be quizzing they can't be quizzing
Perfect	V-ing perfect
I can't have quizzed you can't have quizzed he can't have quizzed we can't have quizzed you can't have quizzed they can't have quizzed	I can't have been quizzing you can't have been quizzing he can't have been quizzing we can't have been quizzing you can't have been quizzing they can't have been quizzing

Interrogative form

Simple form	V-ing form
can I quiz? can you quiz? can he quiz? can we quiz? can you quiz? can they quiz?	can I be quizzing? can you be quizzing? can he be quizzing? can we be quizzing? can you be quizzing? can they be quizzing?
Perfect	V-ing perfect
can I have quizzed? can you have quizzed? can he have quizzed? can we have quizzed? can you have quizzed? can they have quizzed?	can I have been quizzing? can you have been quizzing? can he have been quizzing? can we have been quizzing? can you have been quizzing? can they have been quizzing?

Interro-negative form

Simple form	V-ing form
can't I quiz? can't you quiz? can't he quiz? can't we quiz? can't you quiz? can't they quiz?	can't I be quizzing? can't you be quizzing? can't he be quizzing? can't we be quizzing? can't you be quizzing? can't they be quizzing?
Perfect	V-ing perfect
can't I have quizzed? can't you have quizzed? can't he have quizzed? can't we have quizzed? can't you have quizzed? can't they have quizzed?	can't I have been quizzing? can't you have been quizzing? can't he have been quizzing? can't we have been quizzing? can't you have been quizzing? can't they have been quizzing?