一般单音节词后面用 er,比较长的多音节词前面用more。比如:cheaper 更便宜more expensive 更贵。一般句式的构成: A + is / are+ 形容词比较级+ than + B。A 是主格 B 是宾格。如: She is taller than me.。部分双音节和多音节词的比较级是加 more单音节和部分双音节词是加 er如careful - more carefulinteresting - more interestingtired - more tiredcold -colderhot- hotter