1. In summer the trees are not so beautiful as in autumn.
2. Your friend’s room is not so big as yours.
3. During the holidays the students are not so busy as during the academic year.
1. Lesson 2 is as difficult as lesson 5.
2. This magazine is as thick as that book.
3. The flowers in spring are as beautiful as in summer.
4. There are as many cars and buses in this street as in the centre of the city.