I'm going on a big trip是怎样演变的?

I'm going on a big trip是怎样演变的? I'm going on a big trip. I'm going on a big trip?什么时态? I'm going on a big trip.改为一般过去时 I'm going to on a big trip和I'm going on a big trip意思一样吗 I am going on a big trip. I'm going to take a trip on a big ship.什么意恃 I'm going on a trip. I'm going on a trip. my famly is going on a big trip next week .I’m glad to hear I am going on a big trip.怎样翻译比较好 I am (going on a big trip)对括号提问