English verb conjugation
MAY FAIL

Regular verb: fail - failed - failed

Affirmation

Simple form	V-ing form
I may fail you may fail he may fail we may fail you may fail they may fail	I may be failing you may be failing he may be failing we may be failing you may be failing they may be failing
Perfect	V-ing perfect
I may have failed you may have failed he may have failed we may have failed you may have failed they may have failed	I may have been failing you may have been failing he may have been failing we may have been failing you may have been failing they may have been failing

Negation

Simple form	V-ing form
I may not fail you may not fail he may not fail we may not fail you may not fail they may not fail	I may not be failing you may not be failing he may not be failing we may not be failing you may not be failing they may not be failing
Perfect	V-ing perfect
I may not have failed you may not have failed he may not have failed we may not have failed you may not have failed they may not have failed	I may not have been failing you may not have been failing he may not have been failing we may not have been failing you may not have been failing they may not have been failing

Interrogative form

Simple form	V-ing form
may I fail? may you fail? may he fail? may we fail? may you fail? may they fail?	may I be failing? may you be failing? may he be failing? may we be failing? may you be failing? may they be failing?
Perfect	V-ing perfect
may I have failed? may you have failed? may he have failed? may we have failed? may you have failed? may they have failed?	may I have been failing? may you have been failing? may he have been failing? may we have been failing? may you have been failing? may they have been failing?

Interro-negative form

Simple form	V-ing form
may I not fail? may you not fail? may he not fail? may we not fail? may you not fail? may they not fail?	may I not be failing? may you not be failing? may he not be failing? may we not be failing? may you not be failing? may they not be failing?
Perfect	V-ing perfect
may I not have failed? may you not have failed? may he not have failed? may we not have failed? may you not have failed? may they not have failed?	may I not have been failing? may you not have been failing? may he not have been failing? may we not have been failing? may you not have been failing? may they not have been failing?