Сравните по образцу.
Maths and English. (difficult)-Maths is as difficult as English.
History and Russian, (difficult)-History is not so difficult as Russian.
1.Weather in autumn and weather in summer. (pleasant)
2.A bike and a motor-bike, (comfortable)
3.A snake and a crocodile, (dangerous)
4.Shoes and coats, (expensive)
5.Holidays and week-ends, (wonderful)
6.Ann and Nell, (beautiful)

1 Autumn weather is not so pleasant as summer weather2 A bike is not so comfortable as a motor-bike3 A snake is as dangerous as a crocodile4 Shoes are as expensive as coats5 Week-ends are not so wonderful as holidays6 Ann is as beautiful as Nell