Поставьте следующие предложения в отрицательную и вопросительную формы 1.He asked a porter to help him 2.He will be at the airport two ours before departure.
3.We registered our luggage.

1. He didn't ask a porter to help him. Did he ask a porter to help him?2. He won't be at the airport two hours before departure. Will he be at the airport...? 3. We didn't register our luggage Did we register...?