be going to do.be doing,will do各自用法和注意。有例子 will be doing和will to do/be和be...
\u5728\u8fdb\u884c\u65f6\u4e2d be going to do ,will do ,be to do\u548c be doing\u4f60\u597d\uff0c\u5f88\u9ad8\u5174\u4e3a\u4f60\u89e3\u7b54
be going to \u662f\u6253\u7b97\u7684\u610f\u601d\uff0c\u5e38\u89c1\u4e8e\u53e3\u8bed\u4e2d\u3002\u6216\u8005\u662f\u6839\u636e\u73b0\u5728\u7684\u60c5\u51b5\u5bf9\u672a\u6765\u7684\u4e00\u79cd\u5224\u65ad\uff0c\u4f8b\u5982Look at the sky. It is going to rain.
will do\u662f\u6700\u5e38\u89c1\u7684\u5c06\u6765\u65f6\u3002
be about t do\u662f\u7acb\u5373\u7684\u5c06\u6765\uff0c\u6bd4\u5982\u8bf4The train is about to start.
be to do\u662f\u6b63\u5f0f\u7684\u8ba1\u5212\uff0c\u4f8b\u5982The queen is to visit Japan in 2 months.
be doing\u7684\u786e\u662f\u8fdb\u884c\u65f6\uff0c\u4f46\u662f\u6709\u4e00\u4e9b\u8bcd\u7684\u8fdb\u884c\u65f6\u53ef\u4ee5\u8868\u5c06\u6765\uff0c\u4f8b\u5982take arrive ,\u8fd9\u53ea\u662f\u4e00\u4e9b\u8bcd\uff0c\u4e0d\u5177\u6709\u666e\u904d\u6027\u3002
\u5e0c\u671b\u5bf9\u4f60\u6709\u5e2e\u52a9
\u4f60\u7684\u95ee\u9898\u63d0\u9519\u4e86 \u5417\uff1f
1will be doing...(\u5c06\u6765\u8fdb\u884c\u65f6\uff0c\u8868\u793a\u5728\u5c06\u6765\u67d0\u4e00\u65f6\u523b\u52a8\u4f5c\u6b63\u5728\u53d1\u751f) \u5982\uff1a
\u660e\u665a\u8fd9\u65f6\u5019\uff0c\u6211\u5c06\u5728\u4e0a\u7535\u8111\u8bfe\u3002
I will be having a computer class this time tomorrow.
will to do/be\u662f\u4e0d\u5bf9\u7684\uff0cto \u6ca1\u6709\u7684\uff0c\u662f\u5417\uff1f
will do /be going to do\u7684\u533a\u522b\u5728\u4e8e\uff08\u4ee5\u4f60\u76ee\u524d\u6240\u5b66\u8fdb\u5ea6\uff0c\u6211\u8ba4\u4e3a\u4f60\u8981\u4e86\u89e3\uff09
will do ...\u8868\u5c06\u6765\uff08\u4e0d\u5e26\u6709\u8ba1\u5212\u6027\uff09\uff0c\u800cbe going to ..\u6709\u8ba1\u5212\u6027
We will have a meeting tomorrow.\uff08\u6211\u4eec\u660e\u5929\u5f00\u4f1a\uff09
We are going to have a meeting tomorrow.(\u6211\u4eec\u660e\u5929\u8ba1\u5212\u5f00\u4e2a\u4f1a)
\u76f8\u4fe1\u4f60\u80fd\u7406\u89e3\u8d5e\u540c\u5427\uff01\u795d\u4f60\u8fdb\u6b65\uff01
2.be going to do 将会... 一般用于将来时态
1).I am assuming that the present situation is going to continue.
我认为目前的情况将会继续下去.
2).It's going to cost 200 or as near as dammit. 这要花200英镑上下.
3).How did you find out that Burns was going to be promoted?
你是怎么知道伯恩斯将会得到提升的？
4).You must be out of your mind if you think I'm going to lend you 50!
你以为我会借给你50英镑, 你准是疯了!
5).I'm just going to check in these books at the library. 我要去图书馆还这些书。
6).They are going to move to a new house next week. 下星期他们将迁入新居。
7).It looks as if it is going to rain. 看来要下雨了。
8).Are you going to America by boat or by plane? 你到美国是坐船还是坐飞机？
3.be to do 表示安排、计划、决定、命令或注定要发生的事.
一般用于被动语态，，，to be done
也可以用于主动语态。。。都是表示将来时态
1).The bridge is to be built next year. 大桥将在明年修建。
2).He is to die. 他就要死了。
3).To live is to work. 活着就要工作。
比较：
1).I am to be an engineer. 我就快要成为工程师了。 （这个时间上快一点，而且比较有把握，比如已经考到证了。。）
如果是：
2).I am going to be an engineer. 意思就变成了：我将成为工程师。。。 （这个只是主观愿望。没有多少把握）
4.be about to do 表示即将，马上要做的事，。，
1).I am about to leave. 我马上就要离开了。（刻不容缓，就是这一两分钟的事）
比较：
2).I am going to leave. 我将要离开。（还指不定是什么时候）
5.be doing 主要用于现在进行时态，，有时可以用来表达将来时
1).How are you doing with your new boss? 你跟你的新上司处得如何？
2).We are doing a pilot study to see if the new product will sell well.
我们正在为这种新产品做试销调查，看它的销路好不好。
3).According to these figures, our company is doing well.
从这些数字来看，我们的公司经营得不错。
be going to do表将来时‘计划打算做某事 ’be doing表现在进行时‘正在做…’ will do 表将来时‘将要做某事’eg :1.he is going to sing songs . 2.i am studying
第一个用于将来时，第二个用于现在时，第三个也用于将来时。
扩展阅读：afternoon ... be about doing ... 将来时will和be going to ... be going to go swimming ... waste time doing sth ... it is going to rain ... there is going to ... be going shopping ... be good at doing sth ...
