Тема Present perfect.Сделайте 7 до 16.Надо преобразить в негативную и вопросительную форму

7)They haven't seen each other once for six month. 8) He hasn't already taken the dog for a walk. 9)Kate hasn't flown to London twice since last September. 10)The farmer hasn't already milked the cows. 11)My sister and I haven't just tidied our room. 12)Daniel hasn't returned the library books. 13)She hasn't just cleaned the house. 14)Adam and Sally haven't thrown parties many times for six years. 15)He hasn't been in Turkey since 2002 16)I haven't been abroad tree times before.