high(ly)
1.说人和动物的“高”,不可用high,如不可说a high man和a high horse,该把high改作tall。但说人的“怎样高”,用high和tall都可以,如I am six feet high和I am six feet tall。a high mountain当然是“一座高山”,a high building在英国是“一栋高房子”,在美国是“一所在高处的房子”,如在山顶上,也许它本身并不高。在美国说“一栋高房子”通常说a tall building。
2.highly是副词,high也可以用作副词。现在highly不指实际的“高”,如不说a highly walled city,该把highly改作high。fly high, climb high, aim high(力争上游), play high(进行输赢很大的赌博)等表达方式里也都用high,不用highly。highly指抽象的“高”,如highly cultivated, highly amusing和speak highly of。