I can body-surf you can body-surf he can body-surf we can body-surf you can body-surf they can body-surf
V-ing form
I can be body-surfing you can be body-surfing he can be body-surfing we can be body-surfing you can be body-surfing they can be body-surfing
Perfect
I can have body-surfed you can have body-surfed he can have body-surfed we can have body-surfed you can have body-surfed they can have body-surfed
V-ing perfect
I can have been body-surfing you can have been body-surfing he can have been body-surfing we can have been body-surfing you can have been body-surfing they can have been body-surfing
Negation
Simple form
I can't body-surf you can't body-surf he can't body-surf we can't body-surf you can't body-surf they can't body-surf
V-ing form
I can't be body-surfing you can't be body-surfing he can't be body-surfing we can't be body-surfing you can't be body-surfing they can't be body-surfing
Perfect
I can't have body-surfed you can't have body-surfed he can't have body-surfed we can't have body-surfed you can't have body-surfed they can't have body-surfed
V-ing perfect
I can't have been body-surfing you can't have been body-surfing he can't have been body-surfing we can't have been body-surfing you can't have been body-surfing they can't have been body-surfing
Interrogative form
Simple form
can I body-surf? can you body-surf? can he body-surf? can we body-surf? can you body-surf? can they body-surf?
V-ing form
can I be body-surfing? can you be body-surfing? can he be body-surfing? can we be body-surfing? can you be body-surfing? can they be body-surfing?
Perfect
can I have body-surfed? can you have body-surfed? can he have body-surfed? can we have body-surfed? can you have body-surfed? can they have body-surfed?
V-ing perfect
can I have been body-surfing? can you have been body-surfing? can he have been body-surfing? can we have been body-surfing? can you have been body-surfing? can they have been body-surfing?
Interro-negative form
Simple form
can't I body-surf? can't you body-surf? can't he body-surf? can't we body-surf? can't you body-surf? can't they body-surf?
V-ing form
can't I be body-surfing? can't you be body-surfing? can't he be body-surfing? can't we be body-surfing? can't you be body-surfing? can't they be body-surfing?
Perfect
can't I have body-surfed? can't you have body-surfed? can't he have body-surfed? can't we have body-surfed? can't you have body-surfed? can't they have body-surfed?
V-ing perfect
can't I have been body-surfing? can't you have been body-surfing? can't he have been body-surfing? can't we have been body-surfing? can't you have been body-surfing? can't they have been body-surfing?