may occur
Verbo regular: occur - occurred- occurred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may occur
you may occur
he may occur
we may occur
you may occur
they may occur 	I may be occurring
you may be occurring
he may be occurring
we may be occurring
you may be occurring
they may be occurring	I may have occurred
you may have occurred
he may have occurred
we may have occurred
you may have occurred
they may have occurred	I may have been occurring
you may have been occurring
he may have been occurring
we may have been occurring
you may have been occurring
they may have been occurring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't occur
you mayn't occur
he mayn't occur
we mayn't occur
you mayn't occur
they mayn't occur 	I mayn't be occurring
you mayn't be occurring
he mayn't be occurring
we mayn't be occurring
you mayn't be occurring
they mayn't be occurring	I mayn't have occurred
you mayn't have occurred
he mayn't have occurred
we mayn't have occurred
you mayn't have occurred
they mayn't have occurred	I mayn't have been occurring
you mayn't have been occurring
he mayn't have been occurring
we mayn't have been occurring
you mayn't have been occurring
they mayn't have been occurring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I occur?
may you occur?
may he occur?
may we occur?
may you occur?
may they occur? 	may I be occurring?
may you be occurring?
may he be occurring?
may we be occurring?
may you be occurring?
may they be occurring? 	may I have occurred?
may you have occurred?
may he have occurred?
may we have occurred?
may you have occurred?
may they have occurred? 	may I have been occurring?
may you have been occurring?
may he have been occurring?
may we have been occurring?
may you have been occurring?
may they have been occurring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I occur?
mayn't you occur?
mayn't he occur?
mayn't we occur?
mayn't you occur?
mayn't they occur? 	mayn't I be occurring?
mayn't you be occurring?
mayn't he be occurring?
mayn't we be occurring?
mayn't you be occurring?
mayn't they be occurring? 	mayn't I have occurred?
mayn't you have occurred?
mayn't he have occurred?
mayn't we have occurred?
mayn't you have occurred?
mayn't they have occurred? 	mayn't I have been occurring?
mayn't you have been occurring?
mayn't he have been occurring?
mayn't we have been occurring?
mayn't you have been occurring?
mayn't they have been occurring?