Conjugation of verb "To fail"
Present Simple Continuous
Negative
He/She/It is not failing.
Negative
He/She/It was not failing.
Negative
He/She/It has not failed.
Present Perfect Continuous
Affirmative
He/She/It has been failing.
Negative
You have not been failing.
We have not been failing.
He/She/It has not been failing.
You have not been failing.
They have not been failing.
Interrogative
Has he/she/it been failing?
Negative
He/She/It had not failed.
Affirmative
He/She/It had been failing.
Negative
You had not been failing.
He/She/It had not been failing.
You had not been failing.
They had not been failing.
Interrogative
Had he/she/it been failing?
Affirmative
He/She/It will have failed.
Negative
You will not have failed.
He/She/It will not have failed.
You will not have failed.
They will not have failed.
Interrogative
Will he/she/it have failed?
Negative
He/She/It would not fail.
Affirmative
He/She/It would have failed.
Negative
You would not have failed.
We would not have failed.
He/She/It would not have failed.
You would not have failed.
They would not have failed.
Interrogative
Would he/she/it have failed?