英语 be to 用法 意思
作者&投稿：学侄 （若有异议请与网页底部的电邮联系）
1、表示安排，意向或目的。
例句：The U. S. President is to visit China.美国总统将访问中国。
2、(表义务）应该做……，必须做……
例句：You are to be back by six o'clock.你要在6点之前回来
3、(表可能）会做……
例句：How am I to know what has become of him?我怎么知道他的遭遇如何？
4、注定（通常用过去时）
例句：He came to power，but was to pay dearly for it，soon he was killed.他得到了权力，但是为此付出了昂贵的代价，不久他就被暗杀了。
5、（用于If...were to do句型）如果……的话
例句：If you were to succeed，be sure to make full use of your time. 你如果想成功，就得充分利用时间。
扩展资料：
表将来的特殊形式：
1、be going to do表示打算去做成可能发生某事
2、be to do表示计划好做某事
3、be about to do表示既将（正要）做某事，要友生的动作，其后不接具体的时间状语
4、go , come , leave,arrive等少数转移性不及物动词的现在进行时表示按计划、妥排即将发生的动作，并不那么“固定”
5、leave, open等词的一般现在时可表示“按照时刻表或日程安排发生某事”
在英语里，“
be
+
to
do
”结构可用来表示将来时间，它的具体用法如下:
1.
表示“按计划、安排(要做某事)”。例如:
We
are
to
meet
at
the
school
gate.
(我们将在校门口碰头。)
2.
表示“命令”。例如:
You
are
to
be
back
before
five
o'clock.
(你须在
5
点钟以前回来。)
3.
表示“职责”。例如:
I
am
to
inform
you
that
the
meeting
will
be
held
in
Wuhan.
(我谨通知你会议将在武汉召开。)
4.
表示“目的”。例如:
The
prize
was
to
honour
him
for
his
great
discoveries.
(这项奖励是为了对他的重大发现而表示的敬意。)
5.
表示“用途”。例如:
A
pen
is
to
write
with.
(钢笔是用来写字的。)
6.
表示“命中注定”。例如:
They
were
never
to
meet
again.
(他们注定以后永远不会再见面了。)
7.
表示“应该做(某事)”。例如:
What
are
we
to
do
next?
(我们下一步应该怎么办?)
8.
表示“可能性”。例如:
It's
eleven
o'clock
now.
He
is
to
get
to
Mike's
house.
(现在
11
点了，可能他已经到达迈克的家了。)
9.
表示“征求对方的意见”。例如:
Am
I
to
go
on
with
the
work?
(这项工作我是不是接着干下去?)
意思：将要
例：I am to do it right away. 我马上就去做。
表将要，一般是指计划好的事。
如：I am to America next week.
稍作一下补充：
You are to stay here.
表示命令、要求等。
be +动词不定式（即be + to do sth.）的用法如下：
1.表示按计划或安排要做的事。例如：
When are you to leave for home?你什么时候回家？
She is to be married next month.她将于下个月结婚。
The Queen is to visit Japan in a week’s time.女王将于一周后访问日本。
这种结构也可用于过去。was / were to do sth. 表示曾经计划要做的事，但不表明计划是否被执行，或表示“命运（即命中注定要发生的事）”，而非计划；was / were to have done sth.表示未曾实现的计划。例如：
I felt nervous because I was soon to leave home for the first time.我感到很紧张，因为我很快就要首次离开家了。
They said goodbye, little knowing that they were never to meet again.他们告了别，不知道以后再也不会见面了。
We were to have told you, but you were not in.我们本来想告诉你的，但是你不在家。
2.表示“应该”，相当于should, ought to。例如：
You are to report to the police.你应该报警。
What is to be done?应该怎么办呢？
3.表示“必须”，相当于must, have to。例如：
The letter is to be handed to him in person.这封信必须亲手交给他。
You are to do your homework before you watch TV.看电视之前你得先做完作业。
4.表示“想，打算”，相当于intend, want。例如：
If we are to be there before ten, we’ll have to go now.如果我们要在十点前到，我们现在就得走。
5.用于第一人称疑问句，表示征求对方意见。例如：
Am I to go on with the work?要我继续完成这项工作吗？
What are we to do next?我们下一步该怎么办？
6.用于否定句，表示“禁止”，相当于mustn’t。例如：
The books in this room are not to be taken outside.这个室内的书籍不得带出室外。
You are not to smoke in the reading-room.你不可以在阅览室里吸烟。
7.表示“可以，可能”，相当于may, can。例如：
The news is to be found in the evening paper.这条消息可以在晚报上见到。
Such people are to be found everywhere.这种人到处都有。
She is nowhere to be found.在哪里也找不着她。
8.were to do sth.用于if或even if / even though从句中，表示对未来的假设。例如：
If I were to tell you that I killed him, would you believe me?要是我告诉你是我杀了他，你会相信吗？
Even if the sun were to rise in the west, I would never do such a thing.即使太阳从西边出来，我也决不做这种事。
9.be to blame(该受责备，对某坏事应负责任)与be to let(待出租)两种结构中，用不定式的主动形式表示被动含义。例如：
Which driver is to blame for the accident?这事故是哪个司机的责任？
This house is to let.这房子要出租。
Exercise
1. We have been looking for the boy all the afternoon but he is nowhere _____.
A. to see B. seeing C. seen D. to be seen
2. As early as his second film, Chaplin had developed his own manner of acting, the one that ___ world famous.
A. would become B. became C. was to become D. had become
3. ----We just saw John at the bookstore.
----That’s strange; I didn’t think he ____ back until tomorrow.
A. will come B. was to come C. is coming D. is to come
4. The final examination ___early July.
A. is to be held B. is to be taken place
C. is going to hold D. will be to take place
5. If the sun ___ tomorrow, what would we do?
A. were not to raise B. does not rise
C. would not rise D. were not to rise
6. A new hospital was to ____ in this district, but the money wasn’t collected yet.
A. have been built B. be built C. built D. have built
7. Look at these clouds. ____.
A. It’s going to rain B. It’s raining
C. It is to rain D. It can rain
8. Who do you think ____ for the failure of their marriage.
A. to blame B. to be blame C. is to blame D. is to be blamed
9. Neither you nor he ____ to the front.
A. are to be sent B. is to be sent C. have to be sent D. is to send
10. I ____ to bed when there was a knock at the door.
A. went B. am going to C. was to go D. was about to go
11.----____ we ____ again next week?
----Yes, let’s make it next Wednesday.
A. Are; to meet B. Shall; be to meet
C. Will; meet D. Are; meeting
12. As students, we ____.
A. won’t smoke B. are not to smoke
C. aren’t smoking D. don’t smoke
Key: 1.D 2.C 3.B 4.A 5.D 6.A 7.A 8.C 9.B 10.D 11.A 12.B
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