Key rules for using comparative adjectives 1 . For short adjectives with one syllable, add –er The month end financial report is taking long er than I thought to finish. Our B2B sales are always strong er in the second quarter of the year. 2 . For adjectives with two syllables, add –ier , when the adjective ends in –y . For other adjectives, use more or less in front of the adjective. Emailing reports to the team is eas ier than distributing paper documents. Our production department needs to be more careful with quality issues. 3 . For adjective with three or more syllables, we use more or less The CEO has a private jet, it’s more comfortable than and quicker than flying commercial. Our latest products are more interesting and less expensive for our customers than the previous range. 4 . Use as ... as for similarity and not as ... as for difference Our main competitors are as good as we are at marketing, but their products are not as good as ...