如何下载excel软件:it is only by constant practice that you can learn a foreign language

这是个强调句型,强调状语only by constant practice

只有通过持续练习你才能学好外语.

it is only by constant practice that you can learn a foreign language ：
1）It is...that:强调句型，强调...的内容
2）by 是介词，在这里指用什么方式：by constant practice就是用持续的练习
3）only 再次强调“只有”用持续练习
4）that后面是跟的结果，只有用持续练习，才能。。。

这是个强调句型。it=that you can learn a foreign language 虽然在很多语法讲解中都注明it没有特定意思，但我个人认为你可以把it当着that you can learn a foreign language，这样就成了that you can learn a foreign language is only by constant practice
翻译过来就是：要学会一门外语只有通过不断的练习来实现。正规翻译是：只有通过不断的练习才能学会一门外语。

下面有几个知识点，对你有好处，看看吧！
从一道高考英语题点击“It is ((was)...that/who”强调句型用法
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发表日期：2005年10月14日 【编辑录入：gnwwy】

从一道高考英语题点击“It is (was)...that/who”强调句型用法

周如俊（校长助理）

[试题]（2005年河北、河南、山西高考卷第30小题）It wasn’t until nearly a month later I received the manager’s reply .

A．since B．when C．as D．that

该题是英语中常见强调句型句子结构：“It + be + 被强调部分 + that／who+句子其余部分”。由于这种句型结构复杂，变化多样，在实际使用过程中有一定难度。这种句型也是高考中的常见考点。现将这种题型及解法归纳如下：

1． 如何确定“It is (was)...that/who”句子是否是强调句

“It is (was)...that/who”强调句型可强调的句子成分通常为主语、状语、宾语等，它只是构成强调句型的一种标志，在该句型中，it无词义，在整个句子中不做任何成分，且不可用this，that换用。因此判断一个“It is (was)...that/who”句子是否是强调句型的依据:去掉“ It is (was)...that ”，句子仍成立的话，就是强调句型，否则就可能属于定语从句。如：It was in the street that I met my old friend yesterday．(强调地点状语)

It was yesterday that I met my old friend in the street park．(强调时间状语)

It was my old friend that I met in the street yesterday．(强调宾语)

It was I that/who met him in the street yesterday.（强调主语）

[考题展示]

(2004年高考模拟试题)It was the training __________ he had as a young man __________ made him such a good engineer．

A．what；that B．that；what C．that；which D．which；that

(Key: D)

分析：本句强调的是主语the training，其后又服which引导的定语从句，还原后应为：The training which he had as a young man made him a good engineer．

2． 如何确定“It is (was)...that/who”强调句型的连接词

在“It is (was)...that/who”强调句型中，连接词一般用that，如被强调的部分指人时，可用who(m)／that，其他一律用that，不能用which，where，when等。

[考题展示]

（1）（2004福建卷高考卷英语试题第35小题）It was with great joy ________ he received the news that his lost daughter had been found. A．because B．which C．since D．that

(Key: D)

(2)（1998年高考卷英语试题）It was only when I reread this poems recently ______ I began to appreciate their beauty.

A. until B. that C. then D. so

(Key: B)

3． 如何确定“It is (was)...that/who”中“be”系动词类型

在“It is (was)...that/who”强调结构中，无论被强调的是人还是物，是单数还是复数，be动词一律用is／was形式，如果原句的谓语动词是一般过去时，就用was；如果是一般现在时，就用is。有时也可以用“情态动词+be”形式。强调句型也有疑问句形式。此外，该句型一般疑问句的强调形式，只需将is／was提前，移至句首即可。

如： Might It be yesterday that Marry bought a book for her mother?

[考题展示]:

（1994年上海市高考卷英语试题）Was it in 1979 ______ the American astronaut succeeded ______ landing on the moon? (上海 94)

A. when; on B. that; on C. when; in D. that; in

(Key: D)

4. 如何确定“It is (was)...that/who” 中主语that/who的谓语动词当强调的是主语时，其谓语动词应和被强调的人和物保持人称、数的一致。如果被强调的主语是人称、代词，宜用主格，但有时也可用宾格。如 It is zhanghua who often helps me with my English．

[考题展示]

（2004辽宁高考卷英语试题第28小题）It is said in the book that Thomas Edison (1847-1931) ________ the world leading inventor for sixty years .

A．would be B．has been C．had been D．was

(Key: D)

5． 如何确定“It is (was)...that ”中not…until…结构句型

有时until引导的时间状语从句中可以用在强调句型中，其结构为“It is／was not until…that…”。如：It was not until last Monday that he finished reading the book．

文首考题就是这种题型，不难分析答案为D

[考题展示]

（2004湖北卷高考卷英语试题第24小题）It was ________ back home after the experiment .

A． not until midnight did he go B．until midnight that he didn’t go

C．not until midnight that he went D．until midnight when he didn’t go

(Key: C)