一般将来时，eg:第一组：①Dick will be on duty tomorrow. ②We will know the result tomorrow.中是不是will后跟的词是介词时用will be,跟冠词时直接用will？还有什么情况主语后要跟will be?什么时候主语后直接跟will？第二组：用be going to do sth表一般将来时和用will be/will有什么区别？当be going to do sth表示说话者根据客观现象推断某事是否会发生时和will be 能否转化，例:①we will know the result tomorrow.②I am gong to fall off the parallel bars.中的be going to do sth和will能否互换？第三组:在用一般现在时表将来时be to do 和be about to do 有什么区别？
为什么be going to do等于will be两者却不能转换
追答我也不知道 我们英语老师这么告诉我的
be going to do 一般指已经计划好的事情，而且是主语本身主动要做的事情
will do 指主语本身愿意做的事情
be going to与will的区别
be going to与will两者都可表示将要发生的事、将要去做某事，但它们有如下几点区别：
1. be going to 表示近期、眼下就要发生的事情，will 表示的将来时间则较远一些，如：
He is going to write a letter tonight.
He will write a book one day.
2. be going to 表示根据主观判断将来肯定发生的事情，will表示客观上将来势必发生的事情。
He is seriously ill. He is going to die.
He will be twenty years old.
3. be going to 含有“计划，准备”的意思，而 will 则没有这个意思，如：
She is going to lend us her book.
He will be here in half an hour.
4.在有条件从句的主句中，一般不用 be going to, 而多用will, 如：
If any beasts comes at you, I'll stay with you and help you
will 和be going to的区别
在下列情况下用will:
1.根据说话者的见解和观点对未来作出预言时
I think Smiley will make a good footballer.
Smith will beat Patterson with a knock-out in the second round.
2.在说话时突然作出的决定时，一般用will的缩约式’ll
I’m tired. I think I’ll go to bed.
— Come to supper.
— OK, thanks. I’ll bring a bottle.
3.表示意图、提议、许诺、自愿做某事或坚持做某事时
—There’s the door-bell. — I’ll go.
I will stop smoking— I really will!
4.表示请求和邀请时
Will you give me a hand?
Will you come in and have a drink?
5.表示命令或威胁时
You will start work at six o’clock.
I’ll bit you if you do that again.
6.表示习惯和规律时
She will greet me when she meets me.
Man will die.
在下列情况下用be going to
1.根据现在所见，预计不久肯定会发生的事情时
Look!—it’s going to rain!
The car is going to turn over.
2.谈及打算或事先决定了的事情时
What are you going to be when you grow up?
—Why have you torn the paper into pieces?
—I am going to rewrite it.
额。。汗颜，貌似是粘贴的，，，那第三组呢？
追答还真是粘贴的 一般现在时形式的be about to do，表将来的计划打算。动词不定式to do 可以表将来，但那属于非谓语动词。
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