can grub
Verbo regular: grub - grubbed- grubbed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can grub
you can grub
he can grub
we can grub
you can grub
they can grub 	I can be grubbing
you can be grubbing
he can be grubbing
we can be grubbing
you can be grubbing
they can be grubbing	I can have grubbed
you can have grubbed
he can have grubbed
we can have grubbed
you can have grubbed
they can have grubbed	I can have been grubbing
you can have been grubbing
he can have been grubbing
we can have been grubbing
you can have been grubbing
they can have been grubbing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot grub
you cannot grub
he cannot grub
we cannot grub
you cannot grub
they cannot grub 	I cannot be grubbing
you cannot be grubbing
he cannot be grubbing
we cannot be grubbing
you cannot be grubbing
they cannot be grubbing	I cannot have grubbed
you cannot have grubbed
he cannot have grubbed
we cannot have grubbed
you cannot have grubbed
they cannot have grubbed	I cannot have been grubbing
you cannot have been grubbing
he cannot have been grubbing
we cannot have been grubbing
you cannot have been grubbing
they cannot have been grubbing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I grub?
can you grub?
can he grub?
can we grub?
can you grub?
can they grub? 	can I be grubbing?
can you be grubbing?
can he be grubbing?
can we be grubbing?
can you be grubbing?
can they be grubbing? 	can I have grubbed?
can you have grubbed?
can he have grubbed?
can we have grubbed?
can you have grubbed?
can they have grubbed? 	can I have been grubbing?
can you have been grubbing?
can he have been grubbing?
can we have been grubbing?
can you have been grubbing?
can they have been grubbing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not grub?
can you not grub?
can he not grub?
can we not grub?
can you not grub?
can they not grub? 	can I not be grubbing?
can you not be grubbing?
can he not be grubbing?
can we not be grubbing?
can you not be grubbing?
can they not be grubbing? 	can I not have grubbed?
can you not have grubbed?
can he not have grubbed?
can we not have grubbed?
can you not have grubbed?
can they not have grubbed? 	can I not have been grubbing?
can you not have been grubbing?
can he not have been grubbing?
can we not have been grubbing?
can you not have been grubbing?
can they not have been grubbing?