on high和high on有何分别﹖

mcchan

(1) on high即in the sky，指「在空中」，或「在高处」，例如
On high the dark clouds slid swiftly.
乌云快速飘过天空。

(2) high on即fond of，指「喜欢」，例如﹕
She is high on pop music.
她很喜欢流行音乐。

介系词片语中，介系词位置掉转意思可完全改变，此类例子不少﹕
(3) He made a donation of 5,000 dollars in cash to the library.
他向该图书馆捐赠现金五千美元。
After her husband cashed in, she lived with her son.
(cash in＝die，为美式英文)
老公死后，她和儿子一起住。

(4) There is no doubt that he is in drink.
他无疑是喝醉了。
They stood on top of the hill, drinking in the beauty of the garden city.
他们站在山顶，欣赏这花园城市的美景。(A Dictionary of English Collocations)

(5) I'll leave another million in trust for your child.
我要再留出一百万请人保管，作为给你孩子的财产。(陆谷孙《英汉大词典》)
He trusted in his friends to get him out of the difficulties.
他相信朋友可令其摆脱困境。