现代英语中be going to 和 will 有区别吗？我给学生讲的是可以通用。不知道错没有

will 表自然发生的事情
但是be going to 是表有计划将要发生的事情

例如：
tomorrow the weather will be rainy
而不能说是tomorrow the wearther is going to be rainy

i am going to arrive in australia next year
用will就不准确

因此
he is going to be there tomorrow 更加准确

Lesson Topic: Future Tense Using "Will" And "Be Going To"

Question: You are going out for lunch. You hear your boss saying that his shirt is ready at the dry cleaner's. You are a really faithful, helpful, and loyal employee. What do you say?

1. I'm going to pick it up for you.
2. I'll pick it up for you.
3. Pick it up yourself! You, lazy bum!

C is a great answer if you want to get fired. If you don't want to get fired, we strongly recommend one of the others.

If you chose not to get fired, you are considering A and B. Which one is possible? Which one is best? Which one is usually said by a nat