careful比较级和最高级是:
more careful，the most careful。
He was always careful to toe the party line .他一直很服从党的命令。
Be particularly careful when driving at night .晚上开车要特别小心。
She buys many things by careful spending .她用很少的钱能买很多东西。
We must make a careful study of the matter ...这个问题很值得考究。
Be careful to avoid being subjective and one-sided .切忌主观片面。
careful比较级和最高级是什么
careful的比较级是：more careful，最高级是：the most careful。其意思是小心注意谨慎细致的精心的慎重的。careful用作表语时，其后也可跟动词不定式、that从句。
如：We all think he is one of the most careful students in his class。我们都认为他是班里最细心的学生之一。
