English verb conjugation CAN FAIL

Regular verb: fail - failed - failed

Affirmation

Simple form

I can fail
you can fail
he can fail
we can fail
you can fail
they can fail

V-ing form

I can be failing
you can be failing
he can be failing
we can be failing
you can be failing
they can be failing

Perfect

I can have failed
you can have failed
he 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
he 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
he 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
he 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
he 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
he 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 he fail?
can we fail?
can you fail?
can they fail?

V-ing form

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

Perfect

can I have failed?
can you have failed?
can he 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 he 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 he 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 he 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 he 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 he 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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