来源：中学英语网
更新时间：2024-09-25 09:07:46
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Unit 1 Friendship 重点句型
1. ...but your friend can’t go until he/she finishes cleaning his/her bicycle.
……但是你的朋友不把自行车弄干净不能走。
not ... until 意为“直到……才”，表示主句谓语的动作直到until状语的时间才发生，主句的谓语动词表示的是动作的开始。until引导从句时，如果主句中的谓语动词是延续性动作，则主句用肯定式；如果主句中的谓语动词是短暂性动词，则用否定形式。
“It is/was not until+被强调的部分+that ...”相当于“Not until ... did (does, do, is ...)+主语 ...”意为“直到……才”，是强调形式。
You must stay in bed until your temperature is normal.
体温正常后，你才能起床。
He didn’t leave until the meeting was over.
直到会议结束他才离开。
It was not until she took off her dark glasses that I realized she was a film star.
=Not until she took off her dark glasses did I realize she was a film star.
=I didn’t realize she was a famous film star until she took off her dark glasses.
直到她摘下墨镜我才认出她是一位电影明星。
2. While walking the dog, you were careless and it got loose and was hit by a car.
遛狗的时候，你太大意了，一松手，狗就被车撞了。
while walking the dog是连词while加现在分词短语结构，强调分词的动作正在发生，相当于while you were walking the dog。
在时间、条件、让步、方式等状语从句中，如果从句的主语与主句的主语一致，谓语含有系动词be，可以省略从句的主语和系动词be。
When crossing the street, you should be careful.
过马路时，你应当小心。
If heated, water can be turned into vapour.
如果受热，水会变成蒸气。
温馨提示
在状语从句中，如果从句的主语为it时，也可以将it和助动词be省略。
Whenever possible they would stop him and ask the three questions.可能的话，他们就让他停下问他这三个问题。
3. I wonder if it’s because I haven’t been able to be outdoors for so long that I’ve grown so crazy about everything to do with nature. 我不知道这是不是因为我长久无法出门的缘故，我变得对一切与大自然有关的事物都无比狂热。
此句中的it’s ...that是强调句型。关于强调句型，我们需要掌握以下几点：
（1）强调句型的基本结构：
“It is/was+被强调的成分+that/who+其他成分”用来强调主语、宾语和状语等成分。that只起连接作用，不作成分，但不能省略。当被强调部分为sb.作宾语时，可用who,也可用that,其他情况一律用that。强调主语时，that后的谓语动词必须与被强调的主语在人称与数上保持一致。
（2）特殊句式中的强调句型：
①如果强调的是特殊疑问句中的疑问词，表示“到底”、“究竟”等语气时，就用如下结构：
“特殊疑问词+is/was+it+that/who+该句的其余部分”，that/who后只能使用陈述语序。
②在“not ...until”结构中，由until所引导的短语（或从句）作时间状语时，要用固定的强调句型：“It+is/was+not until ...+that+该句的其余部分”，that所引导的从句中的谓语动词用肯定式。
（3）强调句型要注意和it代表时间、距离、温度、自然现象、具体事物或人物等时所构成的各种句型的区别。判断是否是强调句，可采用“还原法”。如果还原为一般句式后，句子各种成分完整，则是强调句，否则不是。
It was three o’clock when I got home.
我到家的时候三点。
It was at three o’clock that I got home.
三点钟我到的家。
It was in his town that he was brought up.
他是在镇上被养大的。（强调句）
It was this town where/in which he was brought up.
这是他被抚养长大的城镇。（定语从句）
（4）英语中常用助动词do, does或did强调谓语。
He did go to the airport yesterday, but he didn’t find you.
他昨天确实去了机场，但他没有找到你。
It is I that/who am going for a holiday with Mary.
是我跟玛丽一块儿去度假。
When is it that we will have a meeting?
我们什么时候开会？
4. I don't want to set down a series of facts in a diary as most people do ...
我不愿像大多数人那样在日记中记流水账……
as引导的从句为比较状语从句，意为“像大多数人那么做”。
as 用作连词，可引导下列状语从句：
①引导时间状语从句，强调主句谓语与从句谓语的同时性；
②引导让步状语从句，表示“尽管，虽然，即使”（从句需倒装）；
③引导方式状语从句，表示“以……方式”；
④引导原因状语从句 (=since; because)，意为“由于，因为”；
⑤引导比较状语从句。
As he grew older he lost interest in everything except gardening.
随着他年纪越来越大，他失去了对所有事物的兴趣，除了园艺。
Cold as it is, my brother wears only a shirt.
尽管天气冷，我哥哥只穿了一件衬衫。
Why didn't you take the medicine as I told you to?
为什么你没有按我说的来服这种药？
As you were not there, I left a message.
因为当时你不在那，所以我给你留了便条。
She is as tall as you. 她和你一样高。
5. ...it was the first time in a year and a half that I'd seen the night face to face ...
……这是我一年半以来第一次目睹夜晚……
如果前面是“it (will be)is/this (will be)is/that (will be)is+the first/second time that ...”句式，表示“某人第几次做某事”。其中,that引导的是定语从句，后面句子的时态用现在完成时；如果前面是it (would be)was ..., 后面则用过去完成时。
It is the first time that I have come to Zhuhai.
这是我第一次来珠海。
It was the second time that she had visited London.
那是她第二次游览伦敦。
温馨提示
如果time前有last修饰，此时我们一般不用完成时态。
注意：the first time可起从属连词的作用，引导时间状语从句；for the first time意为“第一次”单独用作状语。
This is the last time that I shall give you a lesson.
这是我最后一次给你们上课了。
