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 cannot fail
you cannot fail
he cannot fail
we cannot fail
you cannot fail
they cannot fail

V-ing form

I cannot be failing
you cannot be failing
he cannot be failing
we cannot be failing
you cannot be failing
they cannot be failing

Perfect

I cannot have failed
you cannot have failed
he cannot have failed
we cannot have failed
you cannot have failed
they cannot have failed

V-ing perfect

I cannot have been failing
you cannot have been failing
he cannot have been failing
we cannot have been failing
you cannot have been failing
they cannot 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 I not fail?
can you not fail?
can he not fail?
can we not fail?
can you not fail?
can they not fail?

V-ing form

can I not be failing?
can you not be failing?
can he not be failing?
can we not be failing?
can you not be failing?
can they not be failing?

Perfect

can I not have failed?
can you not have failed?
can he not have failed?
can we not have failed?
can you not have failed?
can they not have failed?

V-ing perfect

can I not have been failing?
can you not have been failing?
can he not have been failing?
can we not have been failing?
can you not have been failing?
can they not have been failing?

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