"Could you please tell me why we say 'earlier', not 'more early' and 'more slowly', not 'slowlier', and what the exact rule is?"

Yen, Tianjin

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In this programme we look at comparative adverbs.

What are the rules about how to form them?

Listen to find out why we say 'more slowly' rather than 'slowlier'.

The word 'earlier' however, is not so straightforward.

If you have a question you'd like us to answer, you can write to us or email: questions.chinaelt@bbc.co.uk