English verb conjugation COULD SURF

Regular verb: surf - surfed - surfed

Affirmation

Simple form

I could surf
you could surf
he could surf
we could surf
you could surf
they could surf

V-ing form

I could be surfing
you could be surfing
he could be surfing
we could be surfing
you could be surfing
they could be surfing

Perfect

I could have surfed
you could have surfed
he could have surfed
we could have surfed
you could have surfed
they could have surfed

V-ing perfect

I could have been surfing
you could have been surfing
he could have been surfing
we could have been surfing
you could have been surfing
they could have been surfing

Negation

Simple form

I could not surf
you could not surf
he could not surf
we could not surf
you could not surf
they could not surf

V-ing form

I could not be surfing
you could not be surfing
he could not be surfing
we could not be surfing
you could not be surfing
they could not be surfing

Perfect

I could not have surfed
you could not have surfed
he could not have surfed
we could not have surfed
you could not have surfed
they could not have surfed

V-ing perfect

I could not have been surfing
you could not have been surfing
he could not have been surfing
we could not have been surfing
you could not have been surfing
they could not have been surfing

Interrogative form

Simple form

could I surf?
could you surf?
could he surf?
could we surf?
could you surf?
could they surf?

V-ing form

could I be surfing?
could you be surfing?
could he be surfing?
could we be surfing?
could you be surfing?
could they be surfing?

Perfect

could I have surfed?
could you have surfed?
could he have surfed?
could we have surfed?
could you have surfed?
could they have surfed?

V-ing perfect

could I have been surfing?
could you have been surfing?
could he have been surfing?
could we have been surfing?
could you have been surfing?
could they have been surfing?

Interro-negative form

Simple form

could I not surf?
could you not surf?
could he not surf?
could we not surf?
could you not surf?
could they not surf?

V-ing form

could I not be surfing?
could you not be surfing?
could he not be surfing?
could we not be surfing?
could you not be surfing?
could they not be surfing?

Perfect

could I not have surfed?
could you not have surfed?
could he not have surfed?
could we not have surfed?
could you not have surfed?
could they not have surfed?

V-ing perfect

could I not have been surfing?
could you not have been surfing?
could he not have been surfing?
could we not have been surfing?
could you not have been surfing?
could they not have been surfing?

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