He is ________than any other boy in the class.(clever)

more clever为什么不用cleverer?两个都可以用，一样的，给你发点有关资料让你看一下吧有关clever在最后一行，你可以看一下英语的形容词和副词的比较级和最高级的构成一 规则变化1 单音节以及少数双音节的词,后面直接加 -er , -est 2以-e结尾的，在后面加-r , -st 3以辅音字母＋y结尾的词，把y变成i,再加-er , -est[注〕 shy ---- shyer , shyest / shier , shiest4重读闭音节的词，要双写词尾字母，再加-er , -est 5多音节的词，要在前面加 more-, most-〔注〕少数单音节词前面加 more-, most- 构成比较级和最高级tired ---- more tired , most tired fond ----- more fond , most fondglad ----- more glad , most glad bored ---- more bored , most boredpleased---- more pleased , most pleased二不规则变化good /well------- better ,bestbad/badly/ill------ worse , worst many/much-------more , most little ------ less , least far ---- farther, farthes / firther , furthestold ---- older , oldest (GA)---- older , oldest / elder , eldest (GB)三下列形容词和副词的比较级和最高级有两种形式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 friendlyclever----- cleverer, cleverest / more clever , most clever