1) Adjectives describe nouns. Adjectives are always put before the nouns, and there can be more than one adjective.
- Sara has a big dog.
- There are some good restaurants in the area.
- It is a useful tool for gardening.
- We need to buy a new car.
- I have a new red jacket.
Adjectives don't change depending on number.
- I have a beautiful cat.
- I have three beautiful cats.
2) Many adjectives derived from verbs can end in -ed or -ing.
- The film was boring.
- She was bored by the film.
When an adjective ends in -ed, it describes a state i.e. the feeling given by something.
- I was interested in the book.
- I'm excited about tomorrow.
- I was surprised to see you.
- The bored man fell asleep.
When an adjective ends in -ing, active in meaning i.e. it describes the feeling given by something.
- Modern art is interesting.
- The news was shocking.
- The book is really confusing.
- The shocking news left us without words.
3) We use suffixes to form different parts of speech.
Noun suffixes: -ness, -ence. Adjective suffixes: -ful, -y, -ous, -al, -ly, -ic, -ent.