Comparative correlatives use the structure 'the + comparative, the + comparative' to show that two things change together in parallel. As one increases or decreases, so does the other. This structure is common in both spoken and written English.
Quick tip: Always use 'the' before BOTH comparatives: 'The more...the better' NOT 'More...better'. Don't combine 'more' with -er forms.
The + comparative, the + comparative
Use the + comparative twice to show parallel change between two things.
The harder you work, the more you achieve.
The sooner we leave, the earlier we'll arrive.
The longer I waited, the more anxious I became.
More/less with longer words
Use the more/less + adjective for words with 2+ syllables.
The more expensive the hotel, the better the service.
The more experienced you become, the more confident you feel.
The less complicated the process, the faster the results.
Subject and verb placement
The subject and verb follow the + comparative phrase.
The older she gets, the wiser she becomes.
The faster you drive, the more dangerous it is.
The more you practice, the better you'll perform.
Common mistakes
Not "More you practice, better you get." — say "The more you practice, the better you get.". Need 'the' before both comparatives.
Not "The more harder you work, the more better." — say "The harder you work, the better.". Don't combine 'more' with -er comparatives.
Not "The price is higher, the quality is better." — say "The higher the price, the better the quality.". Comparative must follow 'the' directly.
Practise it
Create sentences showing cause and effect: 'The more X, the more Y' - think of how changes in one thing lead to changes in another.