我们先对比下两个短语的用法，再来判断是否可在英语表达中互相替换。一、be crazy about 热衷于，醉心于； 迷恋上，爱上用法：be crazy about sth. 着迷某物；着迷；对某物着迷be crazy about doing sth. 疯狂地（痴迷地）做某事例如：He is always crazy about games at/on weekends. 他在周末经常着迷于游戏。(at为英式，on为美式)I am crazy about playing basketball. 我热衷于篮球这项运动。二、be eager for 渴望，想得到用法：be eager for sth. 渴求某事物；迫不及待做某事；渴求某物质 be eager to do sth.=be eager for sth.=be eager that从句例如：He is eager for progress very much. 他非常渴望进步。注意：从英语习惯表达和相关语法书解释来看，很少见 be eager for doing sth.，而只有be eager to do sth. 所以总结如下：在表达"对某事物渴望，或者热衷于某某"时 ， be crazy about sth.=be eager for sth.但表达"痴迷于做某事，热衷于做某事"时， be crazy about doing sth.=be eager to do sth.
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