• Gradable adjectives mean that the person or thing referred to can have more or less of the quality mentioned. They have comparative and superlative forms (apart from very . We can use extremely, fairly, rather, slightly, very with them (very small, slightly more expensive, etc. .
• Non-gradable adjectives do not have comparative and superlative forms. We can use absolutely, totally and completely with them (absolutely full, totally empty, etc. .
1 We couldn't afford tickets for the concert. They were completely/extremely expensive.
2 They were slightly/totally worried when all the lights went out.
3 It was extremely/absolutely cold in the mountains.
4 The journey home was completely/extremely comfortable.
5 They were absolutely/rather certain that all the tickets had sold out.
6 Shakira is a very/completely famous singer.
7 He told me to be totally/very careful on the way home because the roads were rather/ absolutely slippery.
8 Pete was slightly/fairly sure he'd seen the film before.
9 He was absolutely/rather thrilled about the idea of going to Madagascar.
10 The building was fairly/totally empty. No one was there.