may precede
Regular verb: precede - preceded- preceded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may precede
you may precede
he may precede
we may precede
you may precede
they may precede 	I may be preceding
you may be preceding
he may be preceding
we may be preceding
you may be preceding
they may be preceding	I may have preceded
you may have preceded
he may have preceded
we may have preceded
you may have preceded
they may have preceded	I may have been preceding
you may have been preceding
he may have been preceding
we may have been preceding
you may have been preceding
they may have been preceding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't precede
you mayn't precede
he mayn't precede
we mayn't precede
you mayn't precede
they mayn't precede 	I mayn't be preceding
you mayn't be preceding
he mayn't be preceding
we mayn't be preceding
you mayn't be preceding
they mayn't be preceding	I mayn't have preceded
you mayn't have preceded
he mayn't have preceded
we mayn't have preceded
you mayn't have preceded
they mayn't have preceded	I mayn't have been preceding
you mayn't have been preceding
he mayn't have been preceding
we mayn't have been preceding
you mayn't have been preceding
they mayn't have been preceding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I precede?
may you precede?
may he precede?
may we precede?
may you precede?
may they precede? 	may I be preceding?
may you be preceding?
may he be preceding?
may we be preceding?
may you be preceding?
may they be preceding? 	may I have preceded?
may you have preceded?
may he have preceded?
may we have preceded?
may you have preceded?
may they have preceded? 	may I have been preceding?
may you have been preceding?
may he have been preceding?
may we have been preceding?
may you have been preceding?
may they have been preceding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I precede?
mayn't you precede?
mayn't he precede?
mayn't we precede?
mayn't you precede?
mayn't they precede? 	mayn't I be preceding?
mayn't you be preceding?
mayn't he be preceding?
mayn't we be preceding?
mayn't you be preceding?
mayn't they be preceding? 	mayn't I have preceded?
mayn't you have preceded?
mayn't he have preceded?
mayn't we have preceded?
mayn't you have preceded?
mayn't they have preceded? 	mayn't I have been preceding?
mayn't you have been preceding?
mayn't he have been preceding?
mayn't we have been preceding?
mayn't you have been preceding?
mayn't they have been preceding?