It is quite easy to form comparatives and superlatives in English. However, without much practice students will make a lot of mistakes.
To provide enough practice for my students I have created the following exercises. There are three gap-fill exercises where students will practise the grammar in context.
[showmyads] In this post, there are three interactive exercises and a word file with the same exercises to practise the grammar.
Comparing in English – infographic
Show it to your students and explain that students first have to decide if the adjective is long or short. If the adjective is just 1 syllable, it is short. If it ends with -y, it is short. Otherwise, it is long.
Once they know whether the adjective is long or short, they can form the superlatives and comparatives correctly. With short adjectives, they add the suffixes -er or -est. With long adjectives, they add more or most in front of the adjective.
Comparatives and superlatives – online quizzes
There are three quizzes:
Comparing in English – Links
Comparatives and superlatives activities
Comparatives and superlatives speaking activities
Moreover, there are very interesting activities to use in your classroom at British Council site.
I hope you will find this post useful and that your students will practise a lot.