两者均可表示“高”，但high通常表示具体的高，且主要修饰动词；highly主要表示很高的程度(意为“高度地”、“非常地”)，除修饰动词(如speak,praise, think of等)外，还通常用于修饰分词或形容词。
扩展资料
highly的例句：
The college has a highly formalized system of assessment.
这所学院有一套十分固定的评估体系。
She is highly intelligent but her work lacks organization.
她聪慧绝顶，工作却缺乏条理。
The university is highly rated for its research.
这所大学因其研究工作而受到高度评价。
It would be highly undesirable to increase class sizes further.
再增加班级人数，是大家都极不愿意的。
Tom's parents were highly critical of the school.
汤姆的父母对学校提出了强烈的批评。
