it is big of somebody to do somethinggenerous 慷慨的 spoken a) KINDused to say that someone is very kind or generous to do something 某人做某事很大度[慷慨]
b) UNKINDused when you really think that someone is not kind or helpful at all 某人真够大度[大方]的〔反语〕 £5! That was big of her! 五英镑！ 她也真够大方的！
it is big of somebody to do something• A whole dollar! Gee, that was very big of her!• I think it was really big of Larry to admit that he made the wrong choice.
→ it is big of somebody to do something at big1(4)