關於簡單的英文...

兩者分別可看以下例子:

1) will 的用法:
e.g. Will you go to church this Sunday ?
Yes, i will go to church this Sunday.
2) going to 的用法:
e.g. Are you coming to my home ?
Yes, i am going to your home right now.

will是沒有計劃啊
going to是有計劃啊
Ex:I will take a bus.
意思:我將會去坐巴士是沒有計劃
Ex:i am going take a bus.
意思:我將會去坐巴士是有計劃

當然有分別,wil係將會,係唔肯定.而going to係一定會做,係肯定