Три формы глагола fail
потерпеть, неудачу, не, получиться, завершиться, неудачно, закончиться, неудачей, завершиться, неудачей, завершиться, ошибкой, закончиться, неудачно, провалить, проваливать, не, удаваться, не, удаться, подвести, подводить, недоставать, выйти, из, строя, не, выдержать, выходить, из, строя, провалиться, терпеть, неудачу, потерпеть, поражение, терпеть, поражения, не, смочь, не, суметь, рухнуть, потерпеть, крах, не, справиться, не, справляться, не, сработать, не, срабатывать, не, увенчаться, успехом, оказаться, безуспешными, не, состояться, оказаться, неудачным, окончиться, неудачей, потерпеть, провал, потерпеть, фиаско, неудача, провал, сбой
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Present
I fail
you fail
he fails
we fail
you fail
they fail
Present continuous
Past simple
I have failed
you have failed
he has failed
we have failed
you have failed
they have failed
Past continuous
I have been failing
you have been failing
he has been failing
we have been failing
you have been failing
they have been failing
Present perfect
I will fail
you will fail
he will fail
we will fail
you will fail
they will fail
Present perfect continuous
I will be failing
you will be failing
he will be failing
we will be failing
you will be failing
they will be failing
Past perfect
I will have failed
you will have failed
he will have failed
we will have failed
you will have failed
they will have failed
Past perfect continuous
I will have been failing
you will have been failing
he will have been failing
we will have been failing
you will have been failing
they will have been failing
Future
Future continuous
I had failed
you had failed
he had failed
we had failed
you had failed
they had failed
Future perfect
I had been failing
you had been failing
he had been failing
we had been failing
you had been failing
they had been failing
Future perfect continuous
Present
I would fail
you would fail
he would fail
we would fail
you would fail
they would fail
Present continuous
I would be failing
you would be failing
he would be failing
we would be failing
you would be failing
they would be failing
I would have failed
you would have failed
he would have failed
we would have failed
you would have failed
they would have failed
Past continuous
I would have been failing
you would have been failing
he would have been failing
we would have been failing
you would have been failing
they would have been failing
Источник статьи: http://conjugation.ru/english/fail.html