Ответ:

1) Adam is shorter than Tom

2) Adam is the stortest boy in the class.

3) Winter is colder than autumn.

4) Winter is the coldest season of the year.

5) Elephants are the biggest animals in India.

6) Elephants are bigger than tigers.

7) The red jacket is better than the blue jacket.

8) The red jacket is the best thing at the shop.