can backcheck
Verbo regular: backcheck - backchecked- backchecked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can backcheck
you can backcheck
he can backcheck
we can backcheck
you can backcheck
they can backcheck 	I can be backchecking
you can be backchecking
he can be backchecking
we can be backchecking
you can be backchecking
they can be backchecking	I can have backchecked
you can have backchecked
he can have backchecked
we can have backchecked
you can have backchecked
they can have backchecked	I can have been backchecking
you can have been backchecking
he can have been backchecking
we can have been backchecking
you can have been backchecking
they can have been backchecking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't backcheck
you can't backcheck
he can't backcheck
we can't backcheck
you can't backcheck
they can't backcheck 	I can't be backchecking
you can't be backchecking
he can't be backchecking
we can't be backchecking
you can't be backchecking
they can't be backchecking	I can't have backchecked
you can't have backchecked
he can't have backchecked
we can't have backchecked
you can't have backchecked
they can't have backchecked	I can't have been backchecking
you can't have been backchecking
he can't have been backchecking
we can't have been backchecking
you can't have been backchecking
they can't have been backchecking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I backcheck?
can you backcheck?
can he backcheck?
can we backcheck?
can you backcheck?
can they backcheck? 	can I be backchecking?
can you be backchecking?
can he be backchecking?
can we be backchecking?
can you be backchecking?
can they be backchecking? 	can I have backchecked?
can you have backchecked?
can he have backchecked?
can we have backchecked?
can you have backchecked?
can they have backchecked? 	can I have been backchecking?
can you have been backchecking?
can he have been backchecking?
can we have been backchecking?
can you have been backchecking?
can they have been backchecking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I backcheck?
can't you backcheck?
can't he backcheck?
can't we backcheck?
can't you backcheck?
can't they backcheck? 	can't I be backchecking?
can't you be backchecking?
can't he be backchecking?
can't we be backchecking?
can't you be backchecking?
can't they be backchecking? 	can't I have backchecked?
can't you have backchecked?
can't he have backchecked?
can't we have backchecked?
can't you have backchecked?
can't they have backchecked? 	can't I have been backchecking?
can't you have been backchecking?
can't he have been backchecking?
can't we have been backchecking?
can't you have been backchecking?
can't they have been backchecking?