Question

be doing与be going to do有什么区别？

Answer 1

be going to do
表示最近打算进行的事,具有一定的目的性和计划性.(这种安排既有可能是主语做出的,也有可能是别人安排的)
We are going to have a meeting tomorrow.
表示即将要发生的事情，不可避免要发生的事情.(多用于表天气)
It's getting cloudy. It is going to rain.

be doing 是进行时态的谓语结构,在英语里,进行时态都可以表将来时态.但是要符合一定的条件.
一般是以下两条:
01. 用现在进行时表一般将来时,限于动词,come go arrive start die等，表示即将发生的一个动作.
They are leaving tommorrow.
The foreign teacher is arriving on Monday.
02. 用来表示安排好要做的事情(用现在进行是结构表一般将来时含义)仅限于下列动词,do;give;have;leave;leave for;move;play;return;ride;sail;see;set forth;set off;set out;start;start for;stay;travel;visit;wear
The president is starting his state visit to Mexico Friday.
Which hotel are you staying in when you are in Tel Auiu?

Answer 2

区别不是很大阿
如果真要说区别的话 ，如下：

相同点：
be going to do 一般可以和be to do 换用
（两者都表示表示计划，安排或准备去做某事的时候）

不同点：
be to do可以表示命令等语气，相当于should, must 等。
它可以同将来的时间状语连用。
例如：
The letter is to be handed to him in person.
这封信必须面交他本人。

be going to do 可以用来表示某种推断或可能性。
例如：
It's going to rain soon, look at those black clouds.
看那些乌云，快要下雨了。

所以如果碰到两者选一的题目 就要注意他们的不同解释了

Answer 3

be going to do
表示最近打算进行的事,具有一定的目的性和计划性.(这种安排既有可能是主语做出的,也有可能是别人安排的)
We are going to have a meeting tomorrow.
表示即将要发生的事情，不可避免要发生的事情.(多用于表天气)
It's getting cloudy. It is going to rain.

be doing 是进行时态的谓语结构,在英语里,进行时态都可以表将来时态.但是要符合一定的条件.
一般是以下两条:
01. 用现在进行时表一般将来时,限于动词,come go arrive start die等，表示即将发生的一个动作.
They are leaving tommorrow.
The foreign teacher is arriving on Monday.
02. 用来表示安排好要做的事情(用现在进行是结构表一般将来时含义)仅限于下列动词,do;give;have;leave;leave for;move;play;return;ride;sail;see;set forth;set off;set out;start;start for;stay;travel;visit;wear
The president is starting his state visit to Mexico Friday.
Which hotel are you staying in when you are in Tel Auiu? be doing 是现在进行时
be going to do 是一般将来时

Answer 4

gls;':l
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Answer 5

be doing是正在做某事。 eg:He is studying. 他正在学习
be going to do是准备/将要去做某事。 eg:He is going to swiming。 他要去游泳

Answer 6

be doing是现在进行时，正在做什么；有时候也可以是一般将来时，打算做什么。He is leaving for shanghai on Friday.他打算周五去上海
be going to do是一般将来时，He is going to shanghai on Friday.