cimatron IT 120与E系列有什么区别

　1 陈述句的强调句,强调陈述句中的某个成分

为了强调句子中的有些成分,要用强调结构It is（was）+被强调部分+that（who）+其他部分被强调的成分可以是主语、宾语、状语,但不能是定语表语和谓语这种类型的强调句主要注意一下几个方面：

1）It在这一结构中作主句的主语,所以即使被强调部分是复数名词,也要用is或was

eg Tom and Mark often come to see me

It is Tom and Mark Who often come to see me （强调主语）

2）如果被强调部分是时间、地点、方式或原因也不用when, where, how, why, 而用that；强调人时可用who,也可用that

eg（1）They set out the day before yesterday

It was the day before yesterday that they set out （强调时间状语）

（2）We put off the sports meet because of the rain

It was because of the rain that we put off the sports meet（强调原因状语）

（3）It was because she was ill that they didn‘t ask her to do the job （强调原因状语从句）

3）被强调部分如果是原句的主语,who或that后面谓语的人称和数应和原句的主语一致

— Personally, I think it is the salesmanager, rather than the salesgirls, ____ to blame

—I agree with you

A is B that is C are D who are

2 一般疑问句的强调句,只需把is（was）提前

eg （1） Was it in 1939 that the Second World War broke out

（2） Is it Professor Wang who teaches you English

（3） —Was it two months ago _____ you luckily got an opportunity to spend your holiday in Canada

— _____ John was the lucky dog……

A when； Not I B when； Not only C that； Not all D that； Not me

3特殊疑问句的强调句,强调特殊疑问句中的疑问词

eg （1） Where did you find the wallet

Where was it that you found the wallet

（2） When shall we meet

When is it that we shall meet

从上面的例子中我们可以看出,特殊疑问句的强调句是由“特殊疑问词+was（is） it that +陈述句”构成的但是当含有特殊疑问词的强调句型用在宾语从句中的时候,上述句型应改为‘特殊疑问词+it was（ is） that +陈述句“,即采用陈述句语序

eg （1） — where was it ____ the road accident happened yesterday

— In front of the market

A when B that C which D how

（2） I really don‘t know _____ you returned the book to me

A when it was that B when was it C when was it that D when it was

4 有时可用It might be ……that ……,和It must have been……that……的句型表示强调

eg （1）It might be his father that you are looking for

（2）It must have been his brother that you met

5 强调not……until结构中由until引导的短语（或从句）表示时间状语的句型是：It is（was） not until……+that……+其他部分

eg 1）He didn‘t marry until forty

It was not until forty that he married

（2）Mr Yang did not leave the lab until he got everything ready for the experiment

It was not until he had got everything ready for the experiment that Mr Yang left the lab

（3）_____ he realized it was too late to return home

A Not until dark B It was until dark that C It was not until dark that D It was dark that注意：如果not……until放在句首时就要用部分倒装句式,它的语序和在not……until结构中由until引导的短语（或从句）表示时间状语的句型中的语序不同

6 强调词it与先行词it的区别

强调词it与先行词it的区别可以通过恢复原句的方式来判断,即如果把it is……that……去掉后剩下的成分仍然能组成一个完整的句子,这就是强调句型,否则就不是

It is there that accidents often happen

→ Accidents often happen there

以上就是强调句型,被强调成分是状语,把it is……that……去掉,还原成后来的非强调句

It is clear that not all boys like football

上面的句子如果去掉it is……that……后就成了Clear not all the boys like football很显然这不是一个完整的句子,因此不是强调句型,而是由it作先行词引导的一个主语从句

7 其他的一些强调句型：

It is/was+时间段+since从句,It +时间段+before从句,It is/was+时间点+when从句

1）It is/was + 时间 + since …,从……已多久了在这个句型中,主句通常用一般现在时,since从句用过去时,表示一个时间点

eg（1）It is five months since I arrived in New York 我到纽约已五个月了

（2）It is five months since I was in New York我离开纽约已经五个月了

注意：例句中five months是作为一个整体看待的,所以用it is在这类句子中,终止性动词表示从动作发生时算起；如果是状态动词或持续性动词,则从动作或状态结束时算起

2）It is + 时间+ before …在这个句型和上面一个句型中,时间都是时间段,如years,five days,twenty minutes等不过主句的时态多用一般将来时或一般过去时,从句的时态要根据主句的时态进行变化Before前的主句如果是肯定的,翻译成“在……之后才……” 主句如果是否定的,翻译成“不久就……”

eg（1）It was long before he gave an answer

过了好久他才答复我

（2）It was not long before he worked out the difficult maths problem

不一会儿他就把那道数学题解出来了

（3）It will be years before he comes back

过几年他才回来

（4）It was five o‘clock A he came to see me

It was at five o‘clock B he came to see me

It is five years D I left school

It was five years C he joined the army

A when B that C before D since

3）It was + 时间 +when从句在上述句型中it指时间,when引导的是时间状语从句

eg（1）It was at midnight that I got back home yesterday

（2）It was midnight when I got back home yesterday

第一句是强调句型,被强调的时时间状语,因此用介词短语表达,而第二句是一般句型,时间以名词的方式表达,用来作表语

二、谓语动词的强调

it is……that……结构不能强调谓语,如果需要强调谓语,用助动词do, did或does如：

Do come here tomorrow

He did write to you last week

Mary does study hard now

想做英语的练习题的话我建议你可以去我要模考网看看,上面的题型挺全的

不可能发[e]的音的。

你可能听到错误的读音。

也可能读[ət]

现代英语中很多元音的弱化音，都弱化为[ə]（有点奇怪的）

这个it的读音是一般是：

[ɪt]

IT没办法实体E可以IT没办法装配E可以IT有的E基本都有但是E有的IT很多都没有刀路策略很多都留下来了还增加了很多很多功能说也说不清简单一句就是去其糟粕取其精华

1、e的发音音标：[i]或[i:]或[e]或[iə]或[ə]，含有该字母的单词有each、eager、eagle、ear、early、earn、earnest、earth，等等。

2、i的发音音标：[ai]或[i:]或[i]，含有该字母的单词有ice、kite、light、ill、image、night、tip，等等。

扩展资料：

单词解析：

一、each

1、读音：英 [iːtʃ] 美 [iːtʃ] 　

2、翻译：

pron 每个；个人；个自

adj 每；每个

adv 每个

3、例句：We each have our private views about it

我们每个人对这件事都有自己的看法。

二、ear

1、读音：英 [ɪə(r)] 美 [ɪr]

2、翻译：

n 听觉；耳朵；倾听；麦穗

vi 抽穗

3、例句：She plays the piano entirely by ear

他演奏钢琴完全凭听觉记忆,不用乐谱。

三、earth

1、读音：英 [ɜːθ] 美 [ɜːrθ]

2、翻译：n 地球；泥土；世间

3、例句：The moon goes round the earth

月亮绕着地球转。

四、ice

1、读音：英 [aɪs] 美 [aɪs] 　

2、翻译：

n 冰；糖霜；冰淇淋；冷淡；<俚>钻石

v 用冰裹；冰镇；结冰；制冷；涂糖霜

3、例句：The bird picked a hole in the ice with its beak

那鸟在冰上啄出了一个洞。

五、ill

1、读音：英 [ɪl] 美 [ɪl]

2、翻译：

adj 坏的；有病的；恶意的；引起痛苦的

adv 恶劣地；勉强地

n 邪恶；不幸；祸害；坏话

3、例句：There's one bad apple for every three good ones

每四个苹果里就有一个坏的。

1it是物主代词"它"可以做主语和宾语eg(例如)It is a toy它是个玩具2is是be动词的第三人称单数"是",经常用于he,she,it之后eg She is a girl她是个女孩3it's是it is "它是"的缩写,用于陈述语句里eg(例如

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