be going to主要用于
表示事先经过考虑、安排好打算要做的事情
What are you going to do today?
表示根据目前某种迹象判断，某事非常有可能发生
Look! There come the dark clouds. It is going to rain.
will主要用于
表示单纯的未来“将要”通用各个人称
They will go to visit the factory tomorrow.
表示不以人的意志为转移的自然发展的未来的事
Today is Saturday. Tomorrow will be Sunday
问对方是否愿意做某事或表示客气地邀请或命令
Will you please turn on the radio?
<span style="font-weight: bold;">时间状语</span><br>
tomorrow, next day(week, month, year…),soon,<br>the day after tomorrow
肯定句
主语+ be（is,am,are) going to+动词原形 <br>
It's going to snow tomorrow.
主语+will+动词原形<br>
will用于各种人称
Some day people will go to the moon .
主语+Shall+动词原形
shall只用于第一人称。
I will(shall) arrive tomorrow.
否定句<br>
<p>主语+ be <b><font color="#000000"><i>not</i></font></b> going to + 动词原形</p>
It's not going to snow tomorrow.
主语+ will not+ 动词原形<br>
Some day people will not go to the moon .
主语+ Shall not+ 动词原形
I will(shall) not arrive tomorrow.
特殊疑问句
疑问代词/疑问副词 + shall/will + 主语 + 动词原形
Who will play in the basketball match?
疑问代词/疑问副词 + am/is/are + 主语 + going to + 动词原形
What time are you going to get up tomorrow?
