may pre-empt
Regular verb: pre-empt - pre-empted- pre-empted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may pre-empt
you may pre-empt
he may pre-empt
we may pre-empt
you may pre-empt
they may pre-empt 	I may be pre-empting
you may be pre-empting
he may be pre-empting
we may be pre-empting
you may be pre-empting
they may be pre-empting	I may have pre-empted
you may have pre-empted
he may have pre-empted
we may have pre-empted
you may have pre-empted
they may have pre-empted	I may have been pre-empting
you may have been pre-empting
he may have been pre-empting
we may have been pre-empting
you may have been pre-empting
they may have been pre-empting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't pre-empt
you mayn't pre-empt
he mayn't pre-empt
we mayn't pre-empt
you mayn't pre-empt
they mayn't pre-empt 	I mayn't be pre-empting
you mayn't be pre-empting
he mayn't be pre-empting
we mayn't be pre-empting
you mayn't be pre-empting
they mayn't be pre-empting	I mayn't have pre-empted
you mayn't have pre-empted
he mayn't have pre-empted
we mayn't have pre-empted
you mayn't have pre-empted
they mayn't have pre-empted	I mayn't have been pre-empting
you mayn't have been pre-empting
he mayn't have been pre-empting
we mayn't have been pre-empting
you mayn't have been pre-empting
they mayn't have been pre-empting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I pre-empt?
may you pre-empt?
may he pre-empt?
may we pre-empt?
may you pre-empt?
may they pre-empt? 	may I be pre-empting?
may you be pre-empting?
may he be pre-empting?
may we be pre-empting?
may you be pre-empting?
may they be pre-empting? 	may I have pre-empted?
may you have pre-empted?
may he have pre-empted?
may we have pre-empted?
may you have pre-empted?
may they have pre-empted? 	may I have been pre-empting?
may you have been pre-empting?
may he have been pre-empting?
may we have been pre-empting?
may you have been pre-empting?
may they have been pre-empting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I pre-empt?
mayn't you pre-empt?
mayn't he pre-empt?
mayn't we pre-empt?
mayn't you pre-empt?
mayn't they pre-empt? 	mayn't I be pre-empting?
mayn't you be pre-empting?
mayn't he be pre-empting?
mayn't we be pre-empting?
mayn't you be pre-empting?
mayn't they be pre-empting? 	mayn't I have pre-empted?
mayn't you have pre-empted?
mayn't he have pre-empted?
mayn't we have pre-empted?
mayn't you have pre-empted?
mayn't they have pre-empted? 	mayn't I have been pre-empting?
mayn't you have been pre-empting?
mayn't he have been pre-empting?
mayn't we have been pre-empting?
mayn't you have been pre-empting?
mayn't they have been pre-empting?