变化规则
一般在词尾加er 如long变为longer
以不发音的字母e结尾的加r 如late变为later
以重读闭音节结尾的词，而词尾只有一个辅音字母时，先双写这一辅音字母，再加er 如hot变为hotter
以辅音字母加y结尾的双音节词先变y为i再加er 如happy变为happier
多音节词在词前加more 如quickly变为more quickly
另外还有一些不规则变化如good变为better many变为more 这类问题要注意积累
|形容词比较级前加more,最高级前加most的情况：1.多音节形容词。

more popular 2.以-ful 或-less结尾的形容词。

more careful/carless 3.动词的现在分词或过去分词充当形容词。

more tired ,more boring 4.频度副词前。

more often 5.以-ly结尾的形容词前可加more,也可改y为i,再加-er. more friendly/friendlier 6.少数以-ly结尾的副词前。

more slowly/quickly 祝你进步！
big-bigger-biggest thin-thinner-thinnest strong-stronger-strongest good好better best bad坏的worse worst much多（形容不可数名词）more most little少less least many多（形容可数名词）more most far farther farthest 远far further furthest 程度更高的，比如futher education高等教育old老，年纪较长older/elder oldest/eldest 还要注意的是，一些三音节以上的形容词在比较级和最高级变形时，形容词不变形，在该词前加上more，most 如，more interesting tired ---- more tired , most tired fond ----- more fond , most fond glad ----- more glad , most glad bored ---- more bored , most bored pleased---- more pleased , most pleased good /well------- better ,best bad/badly/ill------ worse , worst many/much-------more , most little ------ less , least far ---- farther, farthes / firther , furthest old ---- older , oldest (GA) ---- older , oldest / elder , eldest (GB) cruel----- crueler, cruelest / more cruel , most cruel strict---- stricter , strictest / more strict , most strict often----- oftener , oftenest / more often , most often friendly------ friendlier , friendliest / more friendly , most friendly clever----- cleverer, cleverest / more clever , most clever赞同72|
形容词变比较级的变化规则：单音节词和部分双音节词：（1）直接加er （2）重读闭音节词,双写最后一个字母,加er （3）元音+辅音+e,加r （4）辅音字母+y,把y变为i,加er 多音节词和部分双音节词：（5）在形容词前加more。