English verb conjugation CAN CHALLENGE

Regular verb: challenge - challenged - challenged

Affirmation

Simple form

I can challenge
you can challenge
he can challenge
we can challenge
you can challenge
they can challenge

V-ing form

I can be challenging
you can be challenging
he can be challenging
we can be challenging
you can be challenging
they can be challenging

Perfect

I can have challenged
you can have challenged
he can have challenged
we can have challenged
you can have challenged
they can have challenged

V-ing perfect

I can have been challenging
you can have been challenging
he can have been challenging
we can have been challenging
you can have been challenging
they can have been challenging

Negation

Simple form

I can't challenge
you can't challenge
he can't challenge
we can't challenge
you can't challenge
they can't challenge

V-ing form

I can't be challenging
you can't be challenging
he can't be challenging
we can't be challenging
you can't be challenging
they can't be challenging

Perfect

I can't have challenged
you can't have challenged
he can't have challenged
we can't have challenged
you can't have challenged
they can't have challenged

V-ing perfect

I can't have been challenging
you can't have been challenging
he can't have been challenging
we can't have been challenging
you can't have been challenging
they can't have been challenging

Interrogative form

Simple form

can I challenge?
can you challenge?
can he challenge?
can we challenge?
can you challenge?
can they challenge?

V-ing form

can I be challenging?
can you be challenging?
can he be challenging?
can we be challenging?
can you be challenging?
can they be challenging?

Perfect

can I have challenged?
can you have challenged?
can he have challenged?
can we have challenged?
can you have challenged?
can they have challenged?

V-ing perfect

can I have been challenging?
can you have been challenging?
can he have been challenging?
can we have been challenging?
can you have been challenging?
can they have been challenging?

Interro-negative form

Simple form

can't I challenge?
can't you challenge?
can't he challenge?
can't we challenge?
can't you challenge?
can't they challenge?

V-ing form

can't I be challenging?
can't you be challenging?
can't he be challenging?
can't we be challenging?
can't you be challenging?
can't they be challenging?

Perfect

can't I have challenged?
can't you have challenged?
can't he have challenged?
can't we have challenged?
can't you have challenged?
can't they have challenged?

V-ing perfect

can't I have been challenging?
can't you have been challenging?
can't he have been challenging?
can't we have been challenging?
can't you have been challenging?
can't they have been challenging?

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