英文will / be going to / be ving

will 因為還可以當名詞，表示"意願，意志"
所以 will 比較有"會," "肯定會" 願意"

ex. I'll help you if you want me to. 如果你要我幫你我會幫。
There will be a game tomorrow. 明天將有一場比賽。


be going to 表"打算" 推測 "即將"



ex. I'm going to watch TV tonight. 今晚我打算看電視。
The bridge is going to collapse! 橋快垮了!

而 be Ving 基本上是"來去動詞" 可以用"現在進行式"表示"即將發生的事"
不是所有動詞都有此用法。

ex. Christmas is coming. 聖誕節快來了。
The train is leaving. 火車要開了。(其實還沒開)

be going to 和 will 如果用跟未來的遠近來判斷會有一個問題,
就是什麼叫做遠? 什麼叫做近?
I am going to Japan in six months.
I will hang out with my friends this evening.

2014-01-03 01:43:26 補充：
be going to 有一種計畫要做的意思.
will 則是表達意願.
很多時候這兩種表達方式都可以互換而意思差不多.
但是有時是不行的.

2014-01-03 01:49:58 補充：
舉例:
I'll have to say that you are wrong.
換成 I'm going to have to say that you are wrong. 就非常奇怪.

I will stay at home this evening. (將會)
I am going to stay at home this enening.(打算)
將會, 打算這兩個註解是我聽到這兩句話我心裡的感覺.
你可以參考看看.

will與be going to大家都說明得很好
而be Ving用在未來事物, 只有star大說的正確
只是麗劇中應加上未來時間片語才符合「用在未來事物」的主題:
Christmas is coming in a few days.
=Christmas will come in a few days.
I am having my dinner an hour later.
= I will have my dinner an hour later.

這幾個句型，今天剛教，也是搞很久才清楚

主詞+will將要，後面要+原型v

主詞+be going to也是將要的意思，後面也是要+原型v

這兩個意思都一樣，只是用字方法不同

例如：I will go to works

will後的動詞不可加ing

而be+Ving是妳正要去做某件事情
例如：I'm playing baseball

我已經盡量解釋了^^

Will通常會跟比較遠的未來一起用，
如：I will study in Japan in the future. 我以後會去日本讀書
I will visit you next year. 我明年會去看你

be going to雖然也是未來，但離現在比較近
如：I am going to sleep in ten minutes 我十分鐘後就要睡了
I am going to tell you a story 我等等要跟你說個故事

最後的be + ving
應該是表示正在進行
如：I am reading a book 我正在看書
I am having my dinner 我正在吃晚餐

希望這樣夠清楚