can surf
Verbo regular: surf - surfed- surfed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can surf
you can surf
he can surf
we can surf
you can surf
they can surf 	I can be surfing
you can be surfing
he can be surfing
we can be surfing
you can be surfing
they can be surfing	I can have surfed
you can have surfed
he can have surfed
we can have surfed
you can have surfed
they can have surfed	I can have been surfing
you can have been surfing
he can have been surfing
we can have been surfing
you can have been surfing
they can have been surfing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot surf
you cannot surf
he cannot surf
we cannot surf
you cannot surf
they cannot surf 	I cannot be surfing
you cannot be surfing
he cannot be surfing
we cannot be surfing
you cannot be surfing
they cannot be surfing	I cannot have surfed
you cannot have surfed
he cannot have surfed
we cannot have surfed
you cannot have surfed
they cannot have surfed	I cannot have been surfing
you cannot have been surfing
he cannot have been surfing
we cannot have been surfing
you cannot have been surfing
they cannot have been surfing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I surf?
can you surf?
can he surf?
can we surf?
can you surf?
can they surf? 	can I be surfing?
can you be surfing?
can he be surfing?
can we be surfing?
can you be surfing?
can they be surfing? 	can I have surfed?
can you have surfed?
can he have surfed?
can we have surfed?
can you have surfed?
can they have surfed? 	can I have been surfing?
can you have been surfing?
can he have been surfing?
can we have been surfing?
can you have been surfing?
can they have been surfing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not surf?
can you not surf?
can he not surf?
can we not surf?
can you not surf?
can they not surf? 	can I not be surfing?
can you not be surfing?
can he not be surfing?
can we not be surfing?
can you not be surfing?
can they not be surfing? 	can I not have surfed?
can you not have surfed?
can he not have surfed?
can we not have surfed?
can you not have surfed?
can they not have surfed? 	can I not have been surfing?
can you not have been surfing?
can he not have been surfing?
can we not have been surfing?
can you not have been surfing?
can they not have been surfing?