can ground
Verbo regular: ground - grounded- grounded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can ground
you can ground
he can ground
we can ground
you can ground
they can ground 	I can be grounding
you can be grounding
he can be grounding
we can be grounding
you can be grounding
they can be grounding	I can have grounded
you can have grounded
he can have grounded
we can have grounded
you can have grounded
they can have grounded	I can have been grounding
you can have been grounding
he can have been grounding
we can have been grounding
you can have been grounding
they can have been grounding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't ground
you can't ground
he can't ground
we can't ground
you can't ground
they can't ground 	I can't be grounding
you can't be grounding
he can't be grounding
we can't be grounding
you can't be grounding
they can't be grounding	I can't have grounded
you can't have grounded
he can't have grounded
we can't have grounded
you can't have grounded
they can't have grounded	I can't have been grounding
you can't have been grounding
he can't have been grounding
we can't have been grounding
you can't have been grounding
they can't have been grounding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I ground?
can you ground?
can he ground?
can we ground?
can you ground?
can they ground? 	can I be grounding?
can you be grounding?
can he be grounding?
can we be grounding?
can you be grounding?
can they be grounding? 	can I have grounded?
can you have grounded?
can he have grounded?
can we have grounded?
can you have grounded?
can they have grounded? 	can I have been grounding?
can you have been grounding?
can he have been grounding?
can we have been grounding?
can you have been grounding?
can they have been grounding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I ground?
can't you ground?
can't he ground?
can't we ground?
can't you ground?
can't they ground? 	can't I be grounding?
can't you be grounding?
can't he be grounding?
can't we be grounding?
can't you be grounding?
can't they be grounding? 	can't I have grounded?
can't you have grounded?
can't he have grounded?
can't we have grounded?
can't you have grounded?
can't they have grounded? 	can't I have been grounding?
can't you have been grounding?
can't he have been grounding?
can't we have been grounding?
can't you have been grounding?
can't they have been grounding?