Напишите следующие предложения в вопросительной и отрицательной формах: 1) there is someone at the door. 2) you left something on the hall table. 3) he will bring someone with him. 4) there is somebody in the next room. 5) he has something important to say to you. 6) there is something wrong with this telephone. 7) she gave us something to eat. 8) he spoke to somebody about it.