English verb conjugation
COULD BODY-SURF

Regular verb: body-surf - body-surfed - body-surfed

Affirmation

Simple form	V-ing form
I could body-surf you could body-surf he could body-surf we could body-surf you could body-surf they could body-surf	I could be body-surfing you could be body-surfing he could be body-surfing we could be body-surfing you could be body-surfing they could be body-surfing
Perfect	V-ing perfect
I could have body-surfed you could have body-surfed he could have body-surfed we could have body-surfed you could have body-surfed they could have body-surfed	I could have been body-surfing you could have been body-surfing he could have been body-surfing we could have been body-surfing you could have been body-surfing they could have been body-surfing

Negation

Simple form	V-ing form
I could not body-surf you could not body-surf he could not body-surf we could not body-surf you could not body-surf they could not body-surf	I could not be body-surfing you could not be body-surfing he could not be body-surfing we could not be body-surfing you could not be body-surfing they could not be body-surfing
Perfect	V-ing perfect
I could not have body-surfed you could not have body-surfed he could not have body-surfed we could not have body-surfed you could not have body-surfed they could not have body-surfed	I could not have been body-surfing you could not have been body-surfing he could not have been body-surfing we could not have been body-surfing you could not have been body-surfing they could not have been body-surfing

Interrogative form

Simple form	V-ing form
could I body-surf? could you body-surf? could he body-surf? could we body-surf? could you body-surf? could they body-surf?	could I be body-surfing? could you be body-surfing? could he be body-surfing? could we be body-surfing? could you be body-surfing? could they be body-surfing?
Perfect	V-ing perfect
could I have body-surfed? could you have body-surfed? could he have body-surfed? could we have body-surfed? could you have body-surfed? could they have body-surfed?	could I have been body-surfing? could you have been body-surfing? could he have been body-surfing? could we have been body-surfing? could you have been body-surfing? could they have been body-surfing?

Interro-negative form

Simple form	V-ing form
could I not body-surf? could you not body-surf? could he not body-surf? could we not body-surf? could you not body-surf? could they not body-surf?	could I not be body-surfing? could you not be body-surfing? could he not be body-surfing? could we not be body-surfing? could you not be body-surfing? could they not be body-surfing?
Perfect	V-ing perfect
could I not have body-surfed? could you not have body-surfed? could he not have body-surfed? could we not have body-surfed? could you not have body-surfed? could they not have body-surfed?	could I not have been body-surfing? could you not have been body-surfing? could he not have been body-surfing? could we not have been body-surfing? could you not have been body-surfing? could they not have been body-surfing?