may backdate
Verbo regular: backdate - backdated- backdated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may backdate
you may backdate
he may backdate
we may backdate
you may backdate
they may backdate 	I may be backdating
you may be backdating
he may be backdating
we may be backdating
you may be backdating
they may be backdating	I may have backdated
you may have backdated
he may have backdated
we may have backdated
you may have backdated
they may have backdated	I may have been backdating
you may have been backdating
he may have been backdating
we may have been backdating
you may have been backdating
they may have been backdating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't backdate
you mayn't backdate
he mayn't backdate
we mayn't backdate
you mayn't backdate
they mayn't backdate 	I mayn't be backdating
you mayn't be backdating
he mayn't be backdating
we mayn't be backdating
you mayn't be backdating
they mayn't be backdating	I mayn't have backdated
you mayn't have backdated
he mayn't have backdated
we mayn't have backdated
you mayn't have backdated
they mayn't have backdated	I mayn't have been backdating
you mayn't have been backdating
he mayn't have been backdating
we mayn't have been backdating
you mayn't have been backdating
they mayn't have been backdating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I backdate?
may you backdate?
may he backdate?
may we backdate?
may you backdate?
may they backdate? 	may I be backdating?
may you be backdating?
may he be backdating?
may we be backdating?
may you be backdating?
may they be backdating? 	may I have backdated?
may you have backdated?
may he have backdated?
may we have backdated?
may you have backdated?
may they have backdated? 	may I have been backdating?
may you have been backdating?
may he have been backdating?
may we have been backdating?
may you have been backdating?
may they have been backdating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I backdate?
mayn't you backdate?
mayn't he backdate?
mayn't we backdate?
mayn't you backdate?
mayn't they backdate? 	mayn't I be backdating?
mayn't you be backdating?
mayn't he be backdating?
mayn't we be backdating?
mayn't you be backdating?
mayn't they be backdating? 	mayn't I have backdated?
mayn't you have backdated?
mayn't he have backdated?
mayn't we have backdated?
mayn't you have backdated?
mayn't they have backdated? 	mayn't I have been backdating?
mayn't you have been backdating?
mayn't he have been backdating?
mayn't we have been backdating?
mayn't you have been backdating?
mayn't they have been backdating?