我想了解您的问题是什么，我还没有在我的环境中尝试过.
但是，每当一个单词被识别时，就会调用RecognitionEngine.SpeechRecognized事件，因此在您的情况下，您总是必须说开始"，然后说上".但是我认为这行不通，因为您的开关位于if-"start"语句中.
因此，您需要的是一个bool变量，例如，如果识别出开始"(true)，它将可以处理您的切换，否则bool仍然为false.

希望对您有所帮助！

此致

Hi,

I''m trying to understand what''s your problem is, I didn''t tried it in my enviroment yet.
But recognitionEngine.SpeechRecognized event is called everytime a word is recognized, so in your case you would always have to say "start" and then "up" or something. But I think this can''t work because your switch is IN the if-"start" statement.
So what you need is something like a bool variable, like if "start" was recognized (true), it can handle your switch, otherwise bool is still false.

Hope that helps!

Best Regards