Escribe las siguientes oraciones en forma negativa usando pasado perfecto?

Escribe las siguientes oraciones en forma negativa usando pasado perfecto. 1° my brother had climbed the hill 2° your mother had liked the outdoor activities 3° roberto had been near the waterfall 4° cristina and luisa had been in the stream 5° the birds had flown around the rocks 6° patricia had cooked in the grill when peter arrived 7° the plane had passed over the risk 8° diego had used the rope before his father. Por faa Ayudaa!