often的比较级是oftenner还是more often

often的比较级是oftenner还是more often often是单音节还是双音节,变比较级要加er还是加more? 副词often 的比较级和最高级,以下都对吧?比较级more often 或 oftener often的比较级是什么 happy的比较级有没有more happy形式?我记得 cruel ,strict,friendly,often,co often的比较级和最高级是什么 问 outgoing heavy often 的比较级 Often 的比较级和最高级是什么? 请问clever的比较级是more clever还是cleverer?friendly的比较级是more friendl 请问clever的比较级是more clever还是cleverer? friendly的比较级是more friend more often than not 和usually ,often,always的区别 funny的比较级funnyer是还是more funny?