Сравните животных (картинки в Упражнении 1 (стр.34) могут помочь вам). Examples: The elephant is bigger than the tiger.

Например:

The horse is bigger than the dog (bare, fox, duck, pig, goat).

The fox’s tail is longer than the hare’s (cat’s, pig’s, wolf’s, sheep’s, hamster’s).

The crocodile’s neck is shorter than the cow’s (giraffe’s, horse’s, tiger’s)