English verb conjugation COULD QUIZ

Regular verb: quiz - quizzed - quizzed

Affirmation

Simple form

I could quiz
you could quiz
she could quiz
we could quiz
you could quiz
they could quiz

V-ing form

I could be quizzing
you could be quizzing
she could be quizzing
we could be quizzing
you could be quizzing
they could be quizzing

Perfect

I could have quizzed
you could have quizzed
she could have quizzed
we could have quizzed
you could have quizzed
they could have quizzed

V-ing perfect

I could have been quizzing
you could have been quizzing
she could have been quizzing
we could have been quizzing
you could have been quizzing
they could have been quizzing

Negation

Simple form

I couldn't quiz
you couldn't quiz
she couldn't quiz
we couldn't quiz
you couldn't quiz
they couldn't quiz

V-ing form

I couldn't be quizzing
you couldn't be quizzing
she couldn't be quizzing
we couldn't be quizzing
you couldn't be quizzing
they couldn't be quizzing

Perfect

I couldn't have quizzed
you couldn't have quizzed
she couldn't have quizzed
we couldn't have quizzed
you couldn't have quizzed
they couldn't have quizzed

V-ing perfect

I couldn't have been quizzing
you couldn't have been quizzing
she couldn't have been quizzing
we couldn't have been quizzing
you couldn't have been quizzing
they couldn't have been quizzing

Interrogative form

Simple form

could I quiz?
could you quiz?
could she quiz?
could we quiz?
could you quiz?
could they quiz?

V-ing form

could I be quizzing?
could you be quizzing?
could she be quizzing?
could we be quizzing?
could you be quizzing?
could they be quizzing?

Perfect

could I have quizzed?
could you have quizzed?
could she have quizzed?
could we have quizzed?
could you have quizzed?
could they have quizzed?

V-ing perfect

could I have been quizzing?
could you have been quizzing?
could she have been quizzing?
could we have been quizzing?
could you have been quizzing?
could they have been quizzing?

Interro-negative form

Simple form

couldn't I quiz?
couldn't you quiz?
couldn't she quiz?
couldn't we quiz?
couldn't you quiz?
couldn't they quiz?

V-ing form

couldn't I be quizzing?
couldn't you be quizzing?
couldn't she be quizzing?
couldn't we be quizzing?
couldn't you be quizzing?
couldn't they be quizzing?

Perfect

couldn't I have quizzed?
couldn't you have quizzed?
couldn't she have quizzed?
couldn't we have quizzed?
couldn't you have quizzed?
couldn't they have quizzed?

V-ing perfect

couldn't I have been quizzing?
couldn't you have been quizzing?
couldn't she have been quizzing?
couldn't we have been quizzing?
couldn't you have been quizzing?
couldn't they have been quizzing?

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