speak麻烦解释一下，为什么不用talk，say，谢谢！接语言，尽管没说那种语言，也要用speak的。Can you say it in English？说出话的内容，用say“I don't know him." he said.talk 是不及物动词，不能直接接宾语，多与介词连用。如，I like talking to people. Let's talk about the picture.