[译] 他这一决定的根据根本就没有阐明。
[误] The grounds of his decision was never clearly stated.

[正] The grounds for his decision was never clearly stated.
[注] ①grounds“根据”，这种意义中常用复数形式，但表示单数概念，谓语动词用单数表示。②表示“……之根据”的“之”用 for 不用 of，但有短语 on the grounds(of)，用 of，不用 for。如：She complained of him on the grounds of cruelty. 她以被虐待为由投诉了他。/She had no grounds for complaint. 她没有理由投诉。