问题描述：
1 Stress is what you feel when you are worried about something.
2 People like to visit museums when traveling to new places.
3 It means trying your best.
想知道第一句话feel为什么不加ing 第二三句加 难道有mean doing 这个结构?
2 People like to visit museums when traveling to new places.
3 It means trying your best.
想知道第一句话feel为什么不加ing 第二三句加 难道有mean doing 这个结构?
问题解答：
我来补答展开全文阅读