1.the students have left the room. 2.we have bought a new tv set. 3. i have never been to thailand . 4.he has cooked the soup. 5.they have grown the potatoes. 6. i have worked at the airport. 7.the train has just arrived. сделать отрицание и все типы вопросов ( на )

The students havent left the room.
we havent bought a new TV set.
i havent never been to Thailand.
he hasnt cooked the soup.
they havent grown the potatoes.
i havent worked at the airport.
the train hasnt just arrived.