may frustrate
Regular verb: frustrate - frustrated- frustrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may frustrate
you may frustrate
she may frustrate
we may frustrate
you may frustrate
they may frustrate 	I may be frustrating
you may be frustrating
she may be frustrating
we may be frustrating
you may be frustrating
they may be frustrating	I may have frustrated
you may have frustrated
she may have frustrated
we may have frustrated
you may have frustrated
they may have frustrated	I may have been frustrating
you may have been frustrating
she may have been frustrating
we may have been frustrating
you may have been frustrating
they may have been frustrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't frustrate
you mayn't frustrate
she mayn't frustrate
we mayn't frustrate
you mayn't frustrate
they mayn't frustrate 	I mayn't be frustrating
you mayn't be frustrating
she mayn't be frustrating
we mayn't be frustrating
you mayn't be frustrating
they mayn't be frustrating	I mayn't have frustrated
you mayn't have frustrated
she mayn't have frustrated
we mayn't have frustrated
you mayn't have frustrated
they mayn't have frustrated	I mayn't have been frustrating
you mayn't have been frustrating
she mayn't have been frustrating
we mayn't have been frustrating
you mayn't have been frustrating
they mayn't have been frustrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I frustrate?
may you frustrate?
may she frustrate?
may we frustrate?
may you frustrate?
may they frustrate? 	may I be frustrating?
may you be frustrating?
may she be frustrating?
may we be frustrating?
may you be frustrating?
may they be frustrating? 	may I have frustrated?
may you have frustrated?
may she have frustrated?
may we have frustrated?
may you have frustrated?
may they have frustrated? 	may I have been frustrating?
may you have been frustrating?
may she have been frustrating?
may we have been frustrating?
may you have been frustrating?
may they have been frustrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I frustrate?
mayn't you frustrate?
mayn't she frustrate?
mayn't we frustrate?
mayn't you frustrate?
mayn't they frustrate? 	mayn't I be frustrating?
mayn't you be frustrating?
mayn't she be frustrating?
mayn't we be frustrating?
mayn't you be frustrating?
mayn't they be frustrating? 	mayn't I have frustrated?
mayn't you have frustrated?
mayn't she have frustrated?
mayn't we have frustrated?
mayn't you have frustrated?
mayn't they have frustrated? 	mayn't I have been frustrating?
mayn't you have been frustrating?
mayn't she have been frustrating?
mayn't we have been frustrating?
mayn't you have been frustrating?
mayn't they have been frustrating?