"It"的六种经典用法，你都清楚了吗 英语中的六大词性，你分清楚了吗
翻译：
一、英文：How do you relate requirements and quality versus testing in a data warehouse environment.
//bow~
二、中文：
您如何将需求和质量与数据仓库环境中的测试联系起来。
//鞠躬~
重点词汇：
How： 怎样 ; 如何多少，多么，多大。
do you ：你愿意吗。
relate ：联系;使有联系;把…联系起来;叙述;讲述;讲。
requirements ：所需的东西 ; 必要条件 ; 必备的条件 ; requirement的复数。
quality： 质量 ; 品质 ; 上乘 ; 优质 ; 高标准 ; 人品，素质，品德 ; 优质的 ; 高质量的 ; 盖帽儿了 ; 棒极了。
versus ：对，诉，对抗 ; 与…相对，与…相比。
testing： 试验 ; 测试 ; 检查 ; 棘手的 ; 伤脑筋的 ; 难应付的 ; 测验 ; 考查 ; 化验 ; 检验 ; test的现在分词。
data warehouse： 数据仓库。
environment： 环境 ; 客观环境 ; 自然环境 ; 生态环境 ; 工作平台 ; 软件包。
bow ：鞠躬 ; 点头 ; 低 ; 垂 ; 弯曲 ; 弯腰行礼 ; 船头 ; 艏 ; 弓 ; 蝴蝶结。
以上内容参考 百度百科-翻译
It的用法（专项总结）
一、人称代词
1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复:
①They watched the train until it disappeared in the distance.
2.，也可以指动物或婴儿(未知性别的婴儿或孩子):
②Is this your dog？No, it isn’t.
③They got a baby and it was a ten-pounder
3.，也可指抽象事物或指抽象环境和情景:
③I hate it when people talk with a full mouth.．
二、.非人称代词
1.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：
⑴.指天气：It is a lovely day, isn’t it? ⑵.指时间: It was nearly midnight when she came back.
⑶.指日期:It is April First today. ⑷.指距离:It is some 3000 kilometers from A to B.
⑸.指价值:It is three dollars. ⑹.指温度:Today it is 30 degrees centigrade.
三、其他用法
1.在句子的主语不太明确时充当主语，表示谁在做某事：
①Who is it there? It's I (me/you/he.....). ②I thought it was Mary, but it was not she.
③Her face lighted when she saw who it was.
2.泛泛的指某件事： (有时泛指一般情况)
①It doesn’t matter. ②It is a shame, isn’t it? ③How is it going?(情况怎样)
④It says in the newspaper that......
3.it用在一些词组中，it 没有特别的意思
The last train's gone. Come on, we'll foot it.(来，咱们步行吧。)
四、作形式主语，替代主语从句，动词不定式，或动名词短语：
1.作形式主语替代主语从句
⑴It is clear ( obvious， true， possible， certain....) that 从句 常译为＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂
It is very clear that he’s round and tall like a tree. = That he’s round and tall like a tree is very clear.
⑵It is important ( necessary， right， strange， natural...) that 从句 常译为┅是重要的(必要的,对的,奇怪的,自然的┅).that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去，建议记住该句型中的形容词。
①It is important that we (should) learn English well.②It is necessary that he (should) remember these words.
⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that 从句 常译为＂据说（据报道，据悉．．．）＂。
①It is said that he has come to Beijing. ②It is reported that another earth satellite has been put into orbit.
⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that 从句.that 后的从句要用虚拟语气（should + 动词原形），should 可以省；常译为＂据建议；有命令．．．）
①It is suggested that the meeting ( should ) be put off.
②It was ordered that we ( should ) arrive there in two hours.
⑸It is time ( about time ，high time ) that从句(虚拟语气:动词用过去时did)
① It is time that children went to bed.
⑹It is the first ( second ... ) time that从句(从句用现在完成时 have done )
It was …(从句用过去完成时had done )常译为＂是第一（二）．．．次．．．＂。
It is the first time I have been here. = This is the first time I have been here
⑺It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that从句.
that后的从句一般用虚拟语气（should + 动词原形），should可省去．表示出乎意料，常译为＂竟然＂。没有这种意义时，则不用虚拟语气。
①It is a pity that such a thing ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！
②It is a pity that he is ill. 他生病了，真遗憾！
⑻It happens (seems， looks， appears ) that从句.常译为 “ 碰巧…,似乎是…,看起来…”
①It happened ( so happened ) that he met his teacher in the street. 碰巧．．.
②It seems that he will be back in a few days. 看来．．．
2.作形式主语替代不定式
. ⑴ It is kind ( of sb. ) to do sth. 不定式的逻辑主语是由 of引起，主句中的形容词必须是能表示逻辑主语特征的褒义或贬义形容词。 常见的词有：
bad ， brave ， careless， clever ， cruel ， foolish ， good （好心的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教养的）， polite， rude ， silly ， stupid ， wise ， wrong（错误的）等。 这个句型可以改写为：sb. is kind to do sth. 。 如:It is kind of you to say so. = You are kind to say so.
⑵It is necessary ( for sb. ) to do sth. .不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的中性形容词。 常见的形容词有：
important， necessary， natural easy ， safe ， common ， normal ， hard ， difficult ， dangerous ， unusual， rare ， impossible ， pleasant
如:It is important for her to come to the party. = It is important that she (should ) come to the party.
⑶It takes sb. ... to do sth. 常译为＂做．．．要花费某人．．．＂。
如:It took thousands of people many years to build the Great Wall.
3.作形式主语替代动名词短语
It is no good / no use / useless doing sth. 常译为 “┅有好处或没有用”
①It is no good learning English without speaking English.
②It's useless trying to argue with Shylock.
五、作形式宾语，代替不定式，动名词短语或宾语从句。
We think it important to learn a foreign language.
该句型中的it 作形式宾语，该结构中常用的动词有：think, believe, make ,find consider, feel； 如:
We think it our duty to clean our classroom every day.
He felt it important learning English well.
They found it difficult that they would finish their work in two days.
The Internet makes it easier for companies to keep in touch with customers.
CF: keep sth, in mind / keep in mind that
六、.it的重要句型
1.强调句型: It is/was + 被强调部分 + that 从句 (被强调的主语如果是人，that可以由who换用)
①It was about 600 years ago that the first clock with a face and an hour hand was made.
②It was they that (who ) cleaned the classroom yesterday.
特例:It is not until + 被强调部分 + that ... 该句型也是强调句型。主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是 not ... until ... 的强调形式。
It was not until she took off her dark glasses that I realized she was a famous film star.
(1)it作无人称代词：it作无人称代词表示自然现象、气候、时间、距离等.it是形式主语没有词汇意义.如： 1)It is very cold today．(气候) 2)It is three o'clock．(时间) 3)It is along way from here．(距离)
(2)it作人称代词：it作人称代词时,用来代替上下文中提到的事或物,有时可代替整个句子的内容.
(3)his(was)+形容词十不定式(to do),it为形式主语,不定式短语为真正主语. (过去分词)
(4)his+{形容词}+that(what,how,whether．．．),it为形式主语,that引导的为主语从句. (名词)
(5)It+不及物谓语动词+that引导的主语从句.这些动词有：seem,appear,turn out,follow,happen等.
(6)It may well be that引导的主语从句.
(7)it作形式宾语： 1)某些及物动词+it+形容词十不定式； 2)某些及物动词+it+形容词+that... 在上述两种句型中,it是形式宾语,真正的宾语是不定式短语,或that引导的宾语从句.
(8)it用于强调句型： It is(was)十被强调的成分+that(which,who) 强调句型是简单句,可以用来强调句中主语、宾语和状语,但不能强调定语和谓语.在这种句型中把his．．．that去掉,句子仍成立. 代词在句中分析与翻译的
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