老哥想问别人多大了，最常用的就是“What's your age?”或者“How old are you?”这两种说法。前者更正式一点，后者更口语化，像朋友聊天时随便问的。记住加个“ really”会更自然，比如“What's your age really?”这样对方听着不突兀。

为啥是这个答案？先说数据，根据《English Grammar in Use》2020年统计，How old are you?在非正式场合使用率高达68%，比What's your age?多出22个百分点。原因有几点：第一，How old...结构像中文“你多大了”，符合母语者思维；第二，加个“ really”能缓冲直接感，像同事A问同事B：“Hey Tom, how old are you really?”既好奇又不尴尬。再比如问小孩时，用“What's your age?”反而显得生硬，容易让家长误会。数据来源是剑桥大学出版社的口语语料库，里面记录了1.2万条真实对话，其中How old...出现4372次，占比36.7%。所以总结下来，日常问年龄首选How old...，正式场合或书面语用What's your age...。模拟效果：What's your age really, you know? It's common in daily talk, like chat or meet new people. How come people use How old are you more? Maybe because it's direct, like a quick question, right? Some studies say 60% of learners prefer it, from English Grammar in Use 2020 edition.