知识点1:助动词be的用法与例句
Rice is grown chiefly in the south.
水稻主要在南方种植。
The houses are being rebuilt．
这些房了正在重建。
The plan has been approved．
[1]approve单词记忆法◆记忆方法一：谐音：阿婆入伍 没人同意阿婆入伍。◆记忆方法二：联想方式：appr-(一飘飘然）；ove-love(爱）记忆方法：一飘飘然的爱经认可都是靠不住的。◆记忆方法三：词根词缀记忆法：approve v 赞成；承认（ap+prove→证明可行→赞成）,Prob, prov= test, 表示“测试，证明”◆记忆方法四：approve v.(of)赞成,同意;批准,通过反
计划业已批准。
此外还可以和不定式构成复合谓语表示打算做或应该做的事：
Where are we to meet?
我们在哪里碰头?
Who is to pay?
谁付钱?
You're to be back tonight．
你应今晚回来。
The worst was still to come．
最糟糕的情况还在后头。
知识点2:助动词be的用法
He is to come to the office this afternoon. 要他今天下午来办公室。
c. 征求意见，例如：
How am I to answer him? 我该怎样答复他？
Who is to go there? 谁该去那儿呢？
[2]there单词记忆法◆记忆方法一：联想方式：t-天；here-很热那儿天气很热◆记忆方法二：联想方式：t-天；here-很热记忆方法：那儿天气很热
d. 表示相约、商定，例如：
We are to meet at the school gate at seven tomorrow morning. 我们明天早晨7点在校门口集合。
知识点3:助动词be的用法
You are to hand in the exercises tomorrow. 你们明天必须交练习。
You’re not to (=You mustn’t) smoke here. 你不可以在此处抽烟。
C. 责任、义务、需要，即“该不该”。如：
You are to (=should) report to the police. 你应该报警的。
Am I to go on with the work? 这工作我该不该继续干下去？
D. 可能性，与can, may相当，不定式多用被动式。如：
The book was not to (=could not) be found. 那本书可能找不到了。
E. 假设，用于虚拟条件句中。如：
If it were to rain, we would get wet. 要是下雨，我们就会淋湿。
F. 表示注定要发生或后来必然发生。如：
This experience was to change his life. 这次经历注定要改变他的生活。
注：不定式作表语与上述用法是不同的。如：
[3]不定式,表语,相关知识点用作表语的不定式符号to可以省略吗用作表语的不定式符号to可以省略吗当不定式用作表语时，其中的to原则上不宜省略。如：The important thing is to save lives. 救人要紧。The problem is to find the right house. 问题是要找到合适的房子。His plan is to keep the affair secre
My idea is to go there today. 我的意思是今天就去那里。
be相关单词意思与记忆法：
be单词意思解释释义：
vt. 是, 表示, 在vi. 是, 表示, 在【计】 后端, 总线允许【医】 铍(4号元素)相关词组: be it that... be it true or not be that as it may the...to be so be it
be单词相关例句：
We shall defend our island, whatever the cost may be . We shall fight on the beaches, we shall fight on the landing-grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender.——Winston Churchill British prime minister 无论需要付出多大的代价，我们也要捍卫我们的岛国。我们要战斗在海滩，我们要战斗在登陆地带，我们要战斗在田野、街巷，我们要战斗在山冈、丘陵，我们决不投降。英国首相 丘吉尔， W。
Smokers and nonsmokers can not be equally free in the same railway carriage.——Ceorge Bernard shw. British dramatist. 吸烟者和不吸烟者在同一节车厢里无法享受同样的自由。英国剧作家 肖伯纳，.G.
HAPPINESS——A lifetime of happiness ! No man alive could bear it ; it would be hell on earth .(G. Bernard Shaw ,British dramatist )终身幸福！这是任何活着的人都无法忍受的，那将是人间地狱。(英国剧作家 肖伯纳. G.)
False with one can be false with two. 对一个人虚伪，也会对两个人虚伪。
It is impossible that a man who is false to his friends should be true to his country. 对朋友不义，不可能对国家效忠。
Love all, trust a few, be false to none. 要爱一切人，相信少数人，不要负于任何人。
We are in bondage to the law in order that we may be free. 我们受法律约束，为的是可以自由。
The world can be changed by man's endeavor, and that this endeavor can lead to something new and better .No man can sever the bonds that unite him to his society simply by averting his eyes . He must ever be receptive and sensitive to the new ; and have sufficient courage and skill to novel facts and to deal with them . (Franklin Roosevelt , American President )——人经过努力可以改变世界，这种努力可以使人类达到新的、更美好的境界。没有人仅凭闭目、不看社会现实就能割断自己与社会的联系。他必须敏感，随时准备接受新鲜事物；他必须有勇气与能力去面对新的事实，解决新问题。(美国总统 罗斯福建. F.)
If you command wisely, you'll be obeyed cheerfully. 倘君指挥有方，人人欣然听命。
It is conflict and not unquestioning agreement that deeps freedom alive. In a free country there will always be coflicting ideas, and this is a source of strength.——Thomas Jefferson. American president 使自由保持活力是冲突而不是绝对的一致。在一个自由的国家里总会有各种相冲突的思想，而这正是力量的源泉。美国总统杰斐逊 .T.
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