1.Light - lighter

2.Efficient - more efficient

3.Long - longer

4.Wide - wider

5.Heavy - heavier

6.Fast - faster

7.Dark- darker

8.Soft - softer

9.Hard - harder

10.Durable - more durable

1.is

2.am

3.isn't

4.are

5.are

6.aren't

7.are

8.is

9.am not

10.is