English verb conjugation CAN FAIL

Regular verb: fail - failed - failed

Affirmation

Simple form

I can fail
you can fail
she can fail
we can fail
you can fail
they can fail

V-ing form

I can be failing
you can be failing
she can be failing
we can be failing
you can be failing
they can be failing

Perfect

I can have failed
you can have failed
she can have failed
we can have failed
you can have failed
they can have failed

V-ing perfect

I can have been failing
you can have been failing
she can have been failing
we can have been failing
you can have been failing
they can have been failing

Negation

Simple form

I can't fail
you can't fail
she can't fail
we can't fail
you can't fail
they can't fail

V-ing form

I can't be failing
you can't be failing
she can't be failing
we can't be failing
you can't be failing
they can't be failing

Perfect

I can't have failed
you can't have failed
she can't have failed
we can't have failed
you can't have failed
they can't have failed

V-ing perfect

I can't have been failing
you can't have been failing
she can't have been failing
we can't have been failing
you can't have been failing
they can't have been failing

Interrogative form

Simple form

can I fail?
can you fail?
can she fail?
can we fail?
can you fail?
can they fail?

V-ing form

can I be failing?
can you be failing?
can she be failing?
can we be failing?
can you be failing?
can they be failing?

Perfect

can I have failed?
can you have failed?
can she have failed?
can we have failed?
can you have failed?
can they have failed?

V-ing perfect

can I have been failing?
can you have been failing?
can she have been failing?
can we have been failing?
can you have been failing?
can they have been failing?

Interro-negative form

Simple form

can't I fail?
can't you fail?
can't she fail?
can't we fail?
can't you fail?
can't they fail?

V-ing form

can't I be failing?
can't you be failing?
can't she be failing?
can't we be failing?
can't you be failing?
can't they be failing?

Perfect

can't I have failed?
can't you have failed?
can't she have failed?
can't we have failed?
can't you have failed?
can't they have failed?

V-ing perfect

can't I have been failing?
can't you have been failing?
can't she have been failing?
can't we have been failing?
can't you have been failing?
can't they have been failing?

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