什么时候该用willdo,begoingtodo,bedoing呀?请给出具体例句,并加以分析!

Question

什么时候该用will do,be going to do,be doing呀?
请给出具体例句,并加以分析!

Answer 1

will do 将来打算或计划要做的事,可能发生.I will go to the park next week,the mean maybe I will go to the park next week.
be going to do 将来肯定要发生或要做的事.I am going to go to the park next week,the mean I must go to the park next week.I really really will go to the park next week.
be doing 现在正在做或正在发生的事.I am going to the park,the mean now I am working or another doing to the park,I doing this thing now.