be going to do和be to do的区别 be doing与be going to do有什么区别
\u8fa8\u6790\u201cbe to do\uff0cbe going to do\u201d\uff0c\u548c\u201cbe about to do\u201d\u7684\u533a\u522b\u30021\uff09be to do:
(1)\u8868\u793a\u4e8b\u5148\u5546\u5b9a\u3001\u5b89\u6392\u6216\u51c6\u5907\u8981\u505a\u7684\u4e8b\u60c5\u3002\u5982\uff1a
The students are to meet at the school gate tomorrow. \u660e\u5929\u5b66\u751f\u4eec\u5c06\u5728\u5b66\u6821\u5927\u95e8\u53e3\u96c6\u4f1a\u3002
2\uff09\u8868\u793a\u53ef\u80fd\u6027\uff0c\u5fc5\u8981\u3001\u8d23\u4efb\u3001\u4e49\u52a1\u3001\u7981\u6b62\u7b49\u3002\u5982\uff1a
Her necklace was not to(couldn't)be found. \u5979\u7684\u9879\u94fe\u627e\u4e0d\u5230\u4e86\u3002 2) be going to do:
1) \u8868\u793a\u5c06\u8981\u53d1\u751f\u7684\u4e8b\u60c5\u6216\u6253\u7b97\u6700\u8fd1\u8981\u8fdb\u884c\u7684\u52a8\u4f5c\u3002\u5982\uff1a It is going to rain soon. \u5feb\u8981\u4e0b\u96e8\u4e86\u3002
2) \u5728\u542b\u6709\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u7684\u4e3b\u4ece\u590d\u5408\u53e5\u4e2d\uff0c\u4e3b\u53e5\u4e00\u822c\u4e0d\u7528be going to\uff0c\u800c\u5e38\u7528will\uff08\u7b2c\u4e00\u4eba\u79f0\u7528shall\uff09\u3002\u5982\uff1a
The football match will be put off if it rains tomorrow. \u5982\u679c\u660e\u5929\u4e0b\u96e8\uff0c\u8db3\u7403\u8d5b\u5c06\u88ab\u63a8\u8fdf\u4e3e\u884c\u3002
3) be about to do:
1) \u8868\u793a\u5373\u5c06\u53d1\u751f\u7684\u52a8\u4f5c\uff0c\u5728\u65f6\u95f4\u4e0a\u6307\u6700\u8fd1\u7684\u5c06\u6765\u3002\u5982\uff1a We are about to start. \u6211\u4eec\u5c31\u8981\u51fa\u53d1\u4e86\u3002
The new school year is about to begin. \u65b0\u5b66\u5e74\u5f00\u5b66\u5728\u5373\u3002
2) \u5728\u542b\u6709be about to do\u7684\u53e5\u5b50\u4e2d\uff0c\u4e0d\u80fd\u518d\u52a0\u65f6\u95f4\u72b6\u8bed\u3002\u5982\uff1a Wrong: The medical team is about to start immediately.
Right: The medical team is about to start. \u533b\u7597\u961f\u5c31\u8981\u51fa\u53d1\u4e86\u3002
\u9644\uff1abe to do \u7528\u6cd5\u7684\u8be6\u7ec6\u8bb2\u89e3\uff1a
be to +\u52a8\u8bcd\u4e0d\u5b9a\u5f0f\u4e2d\u7684be to\u7528\u4f5c\u60c5\u6001\u4e60\u8bed, \u8fd9\u65f6\u7684be to do\u8868\u793a: \u201c\u8ba1\u5212\u201d\u3001\u201c\u5b89\u6392\u201d\u3001\u201c\u4e49\u52a1\u201d\u3001\u201c\u5e94\u8be5\u201d\u3001\u201c\u53ef\u80fd\u201d\u3001\u201c\u547d\u8fd0\u201d\u7b49\u3002(have to, ought to)\u3002\u5982: He is to have a holiday. (\u8868\u793a\u5c06\u6765)
The committee is to meet today. (\u8868\u793a\u8ba1\u5212\u3001\u5b89\u6392)
You are to go to the hotel where rooms have already been booked for you. 1. \u8868\u793a \u201c\u5c06\u201d\u3001\u201c\u8ba1\u5212\u201d\u3001\u201c\u5b89\u6392\u201d\u3002(\u610f\u601d\u63a5\u8fd1\u4e8ebe going to) \u5982\uff1a Their daughter is to get married soon.
It was the last film at the cinema\uff0cwhich was to close next day.
was/ were to do \u8868\u793a\u8fc7\u53bb\u66fe\u7ecf\u8ba1\u5212\u8981\u505a\u7684\u4e8b\uff0c\u6216\u8005\u8fc7\u53bb\u5e94\u5f53\u505a\u7684\u4e8b\uff0c\u800c\u4e14\u4ece\u73b0\u5728\u7684\u89d2\u5ea6\u6765\u770b\u5df2\u7ecf\u5b9e\u73b0\u4e86\u3002\u5982\uff1a
I felt nervous because I was soon to leave home for the first time. The expedition was to start in a week\u2019s time. was/ were to have done, \u8868\u793a \u201c\u672c\u6253\u7b97\u201d\u3001\u201c\u672c\u8ba1\u5212\u201d\u6216\u201c\u672c\u5e94\u5f53\u201d \u505a\u7684\u4e8b\u800c\u6ca1\u6709\u505a\u6210\u6216\u6ca1\u6709\u53d1\u751f\u3002\u5982:
I was to have seen him last Wednesday, but he didn\u2019t come. We were to have been married last year.
2. \u8868\u793a \u201c\u4e49\u52a1\u201d\u3001\u201c\u5e94\u8be5\u201d \u3002(\u610f\u601d\u63a5\u8fd1\u4e8eshould\uff0c must\uff0c ought to\uff0c have to) \u5982\uff1a No one is to leave the building. \u8c01\u4e5f\u4e0d\u5f97\u79bb\u5f00\u8fd9\u697c\u623f\u3002
You are not to smoke in this room.=You are not supposed to smoke in this room. You are to be back by 10 o\u2019clock. \u4f60\u5fc5\u987b\u5341\u70b9\u4ee5\u524d\u56de\u6765\u3002
4. \u8868\u793a \u201c\u547d\u8fd0\u201d, \u5c06\u6765\u5fc5\u7136\u8981\u53d1\u751f\u7684\u4e8b, \u8bd1\u4f5c \u201c\u6ce8\u5b9a\u2026\u2026\u201d\u3002\u5982\uff1a
He came to power, but he was to play dearly for it: soon he was assassinated. They said goodbye, little knowing they were never to meet again\u3002
\u5c06\u6765\u65f6\u6001 will/be going to/be doing\u7684\u672c\u8d28\u533a\u522b\uff08\u4e00\uff09
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.
