多音节词 (>2音节) | 词前加 more / most | careful interesting slowly (adv.) | more careful more interesting more slowly | most careful most interesting most slowly |
部分双音节词 | 词尾加 -er / -est 或加 more / most (两种皆可) | clever common often (adv.) | cleverer / more clever commoner / more common oftener / more often | cleverest / most clever commonest / most common oftenest / most often |