1. Alan's eyes are bigger, than Peter's.
2. Mount Everest is higher, than K2.
3. Paula's hair is longer, than Martha's.
4. My girlfriend is prettier, than Rose .
5. John is more intelliogent, than his sister.
6. Mary is more beautiful, than Dorothy.
Думаю, что так. Если не так, напиши в комментариях, а потом отмечай нарушение.