may backcheck
Verbo regular: backcheck - backchecked- backchecked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may backcheck
you may backcheck
he may backcheck
we may backcheck
you may backcheck
they may backcheck 	I may be backchecking
you may be backchecking
he may be backchecking
we may be backchecking
you may be backchecking
they may be backchecking	I may have backchecked
you may have backchecked
he may have backchecked
we may have backchecked
you may have backchecked
they may have backchecked	I may have been backchecking
you may have been backchecking
he may have been backchecking
we may have been backchecking
you may have been backchecking
they may have been backchecking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't backcheck
you mayn't backcheck
he mayn't backcheck
we mayn't backcheck
you mayn't backcheck
they mayn't backcheck 	I mayn't be backchecking
you mayn't be backchecking
he mayn't be backchecking
we mayn't be backchecking
you mayn't be backchecking
they mayn't be backchecking	I mayn't have backchecked
you mayn't have backchecked
he mayn't have backchecked
we mayn't have backchecked
you mayn't have backchecked
they mayn't have backchecked	I mayn't have been backchecking
you mayn't have been backchecking
he mayn't have been backchecking
we mayn't have been backchecking
you mayn't have been backchecking
they mayn't have been backchecking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I backcheck?
may you backcheck?
may he backcheck?
may we backcheck?
may you backcheck?
may they backcheck? 	may I be backchecking?
may you be backchecking?
may he be backchecking?
may we be backchecking?
may you be backchecking?
may they be backchecking? 	may I have backchecked?
may you have backchecked?
may he have backchecked?
may we have backchecked?
may you have backchecked?
may they have backchecked? 	may I have been backchecking?
may you have been backchecking?
may he have been backchecking?
may we have been backchecking?
may you have been backchecking?
may they have been backchecking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I backcheck?
mayn't you backcheck?
mayn't he backcheck?
mayn't we backcheck?
mayn't you backcheck?
mayn't they backcheck? 	mayn't I be backchecking?
mayn't you be backchecking?
mayn't he be backchecking?
mayn't we be backchecking?
mayn't you be backchecking?
mayn't they be backchecking? 	mayn't I have backchecked?
mayn't you have backchecked?
mayn't he have backchecked?
mayn't we have backchecked?
mayn't you have backchecked?
mayn't they have backchecked? 	mayn't I have been backchecking?
mayn't you have been backchecking?
mayn't he have been backchecking?
mayn't we have been backchecking?
mayn't you have been backchecking?
mayn't they have been backchecking?