Luyện ngữ pháp - Destination C1 and C2 ((Unit 15: Grammar - Adjectives and adverbs))
Some words have the same form as an adjective and as an adverb and some also form adjectives with -ly. The different forms can have different meanings. These include:
✓ Sandstone is not a very hard material. ✓ Hit it too hard and you'll break it. ✓ I could hardly hear the music. ✘ Hit it too hardly and you'll break it.
