speak指说话的能力，说话这个动作，不强内容，用于开口讲话，演说，讲某种语言，talk指两人之间的交谈，“不说话”指说话这个动作，所以用speak。
What makes you silent 这句没错，要加问号是什么原因令你默默无语“你怎么不说话”－－－Why do you keep silent。
Why didn#39t you say a word？或Why didn#39t you say anything。
你为什么不说话了英文翻译Why don#39t you speak？语法说明以特殊疑问词开头，对句中某一成分提问的句子叫特殊疑问句常用的疑问词有what who whose which when where how why等重点单词解释why wa#618 used in questions to ask the reason for or purpose of sth。
