may invigilate
Regular verb: invigilate - invigilated- invigilated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may invigilate
you may invigilate
he may invigilate
we may invigilate
you may invigilate
they may invigilate 	I may be invigilating
you may be invigilating
he may be invigilating
we may be invigilating
you may be invigilating
they may be invigilating	I may have invigilated
you may have invigilated
he may have invigilated
we may have invigilated
you may have invigilated
they may have invigilated	I may have been invigilating
you may have been invigilating
he may have been invigilating
we may have been invigilating
you may have been invigilating
they may have been invigilating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't invigilate
you mayn't invigilate
he mayn't invigilate
we mayn't invigilate
you mayn't invigilate
they mayn't invigilate 	I mayn't be invigilating
you mayn't be invigilating
he mayn't be invigilating
we mayn't be invigilating
you mayn't be invigilating
they mayn't be invigilating	I mayn't have invigilated
you mayn't have invigilated
he mayn't have invigilated
we mayn't have invigilated
you mayn't have invigilated
they mayn't have invigilated	I mayn't have been invigilating
you mayn't have been invigilating
he mayn't have been invigilating
we mayn't have been invigilating
you mayn't have been invigilating
they mayn't have been invigilating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I invigilate?
may you invigilate?
may he invigilate?
may we invigilate?
may you invigilate?
may they invigilate? 	may I be invigilating?
may you be invigilating?
may he be invigilating?
may we be invigilating?
may you be invigilating?
may they be invigilating? 	may I have invigilated?
may you have invigilated?
may he have invigilated?
may we have invigilated?
may you have invigilated?
may they have invigilated? 	may I have been invigilating?
may you have been invigilating?
may he have been invigilating?
may we have been invigilating?
may you have been invigilating?
may they have been invigilating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I invigilate?
mayn't you invigilate?
mayn't he invigilate?
mayn't we invigilate?
mayn't you invigilate?
mayn't they invigilate? 	mayn't I be invigilating?
mayn't you be invigilating?
mayn't he be invigilating?
mayn't we be invigilating?
mayn't you be invigilating?
mayn't they be invigilating? 	mayn't I have invigilated?
mayn't you have invigilated?
mayn't he have invigilated?
mayn't we have invigilated?
mayn't you have invigilated?
mayn't they have invigilated? 	mayn't I have been invigilating?
mayn't you have been invigilating?
mayn't he have been invigilating?
mayn't we have been invigilating?
mayn't you have been invigilating?
mayn't they have been invigilating?