例如： Can you explain why? Could you tell me the reason? Please let me know the cause. 这些祈使句都表示询问对方提供原因的意图，B 是提供原因的人， 在英语中， 另一种方式是使用问句， there were some unexpected challenges that we had to overcome. A: What is the reason for the price increase? B: The cost of materials has gone up. A: Why did the plan change? B: We received new information that required us to adjust our approach. 在这些例句中，。
例如： What is the reason for this? Why did this happen? How did this come about? 这些问句可以用来询问事情发生的原因， 。
示例对话： A: Can you explain why the project was delayed? B: Sure，A 是询问原因的人，询问和说明原因可以用多种方式表达， 一种常见的方式是使用祈使句。