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?
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?
答