it开头的惯用句型

it开头的惯用句型
【疑难点津】it常放在句子开头，作某些惯用或固定句型的主语。

常见句型有：
1.“it+be+特定动词的过去分词+that从句”。

这样的过去分词有：said, reported, believed, known, decided, proved, thought, arranged等。

如：
It is said that my German teacher often goes to Germany to do research.据说我的德语老师
经常去德国做研究。

2. “it +特定动词+ that从句”。

这样的特定动词有：appear, happen, occur, seem等。

如：
It never occurred to me that I would travel to America.我从没想过我会去美国旅行。

3. “it +特定动词+ as if从句”。

这样的特定动词有：appear, seem等。

如：
It appears as if you are very tired.看起来你好像很累。

4. “it has been/is +一段时间+ since从句”。

从句中谓语用短暂性动词时表示“自从该动词动作发生以来有一段时间了”；用持续性动词时表示“自从该动作结束以来有一段时间了”。

试比较：
It is six years since I began to work here.自从我在这儿工作以来已经有六年了。

It has been six years since I worked here.我不在这儿工作已经有六年了。

5. “it +be+一段时间+ before从句”。

从句中谓语用短暂性动词；主句中be动词可以用肯定式或否定式，其时态可以是一般过去时或一般将来时。

常译为“……才……”或“……就……”。

如：
It won’t be a long time before we finish cooking.不久我们就会把饭做好。

It was four days before they found the lost child.过了四天他们才找到那个失踪的孩子。

6. “it is (high) time + that从句”。

表示“到了某人该做某事的时间了”，从句谓语要用一般过去时，也可用should do的形式。

另外“it is (high) time for sb. to do sth”,也表示同样的意思。

如：
It is high time that I went to see my mother in the hospital.到了我去医院看妈妈的时间了。

It is time for you to do your homework.到你做家庭作业的时间了。

7. “it is/was +强调内容+ that/who从句”。

这是一个强调句型，强调的内容是事物或是指人的宾语时，常用that引导从句；强调的内容是指人的主语时通常用who引导从句。

如：It is in the street that I came across Mr. Li.是在街上我碰到了李先生。

It was my friend who picked me up at the station. 是我朋友在车站接上我的。

【考题链接】
was in 1979 I graduated from the university. (1998上海卷)
A. That; that
B. It; that
C. That; when
D. It; when
When you are old and grey and full of sleep,
And nodding by the fire, take down this book,
And slowly read, and dream of the soft look
Your eyes had once, and of their shadows deep; How many loved your moments of glad grace, And loved your beauty with love false or true,
But one man loved the pilgrim soul in you,
And loved the sorrows of your changing face; And bending down beside the glowing bars, Murmur, a little sadly, how love fled
And paced upon the mountains overhead
And hid his face amid a crowd of stars.
The furthest distance in the world
Is not between life and death
But when I stand in front of you
Yet you don't know that
I love you.
The furthest distance in the world
Is not when I stand in front of you
Yet you can't see my love
But when undoubtedly knowing the love from both
Yet cannot be together.
The furthest distance in the world
Is not being apart while being in love
But when I plainly cannot resist the yearning
Yet pretending you have never been in my heart. The furthest distance in the world
Is not struggling against the tides
But using one's indifferent heart
To dig an uncrossable river
For the one who loves you.。