I can surf you can surf he can surf we can surf you can surf they can surf
Forme en V-ing
I can be surfing you can be surfing he can be surfing we can be surfing you can be surfing they can be surfing
Perfect
I can have surfed you can have surfed he can have surfed we can have surfed you can have surfed they can have surfed
Perfect en V-ing
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
Négation
Forme simple
I cannot surf you cannot surf he cannot surf we cannot surf you cannot surf they cannot surf
Forme en V-ing
I cannot be surfing you cannot be surfing he cannot be surfing we cannot be surfing you cannot be surfing they cannot be surfing
Perfect
I cannot have surfed you cannot have surfed he cannot have surfed we cannot have surfed you cannot have surfed they cannot have surfed
Perfect en V-ing
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
Forme interrogative
Forme simple
can I surf? can you surf? can he surf? can we surf? can you surf? can they surf?
Forme en V-ing
can I be surfing? can you be surfing? can he be surfing? can we be surfing? can you be surfing? can they be surfing?
Perfect
can I have surfed? can you have surfed? can he have surfed? can we have surfed? can you have surfed? can they have surfed?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
can I not surf? can you not surf? can he not surf? can we not surf? can you not surf? can they not surf?
Forme en V-ing
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?
Perfect
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?
Perfect en V-ing
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?