状语从句是指在主句中作状语的主谓结构。状语从句根据其在主句中的句法作用可分为时间、地点、方式、原因、目的、结果、让步、比较和条件等九种状语从句。掌握状语从句的关键是熟悉能连接状语从句的从属连词的意思和用法。

1.时间状语从句

真题应用：

1. I look at it before I go to sleep and as soon as I wake up .(21阅读)

2.Once a solid, loving foundation is in place, puppies must leave their raisers and return to the training center of the Guiding Eyes for the Blind in New York for official guide dog training. （22阅读）

3.But they usually agree to wait until the temperatures are regularly above 10℃.（23阅读）

4.When coupled with a calorie-reduced diet, jumping rope can help reduce your body weight and body fat from three to seven pounds in eight weeks.(24选句子)

5.He took up the sport __2 __ he was 14.Now, 78 years later, he is still playing.（25选词）

时间状语从句通常由下列连词引导：when（当......时候），whenever（任何时候），as（当......时），before（在......以前），after（在......以后），since（自从......），as soon as（一......就），once（一旦......),until（直到......才），while（在......期间）。

Eg: While I stayed in America,I visited the museum twice.

I have been interested in English ever since/ since I was 8 years old.

Before leaving the room, you should turn off lights.

Before I realized what happened to me,I had been struck by a big log.

After he had finished the task,he took a travel abroad.

He didn't leave until his mother came back.

Once he makes up his mind,nothing can change it.

2.地点状语从句

地点状语从句通常由下列连词引导：where（哪里、在……地方），wherever（在任何地方），everywhere（在每处地方）。

Eg: I have kept the portrait where I can see it every day, as it always reminds me of my university days in London.

You should put the book where it was．

You have the right to live where you want．

Sit wherever you like．

3.原因状语从句

真题应用：

1.I joined to see what my grandchildren are doing ,as my daughter posts videos and photos of them .(21阅读)

2.We make sure it can't be a money grab because the money can only be used for speed-lowering improvements on the streets.(24阅读)

3.They should have a positive outlook on life, for optimistic people are more likely to lead longer and healthier lives.(24翻译)

4."Backward walking improves cognitive function by improving spatial awareness and coordination because it is an activity that needs greater concentration and focus." says Ashwini Nadkarni.(25阅读)

原因状语从句通常由下列连词引导：because（因为），since（既然），as（因为），for（由于），not that…but that…（不是……而是……）

Eg: She has just missed her bus because the timetable has changed.

As the weather was fine，we decided to climb the mountain．

Now that all are present, let’s start the discussion．

Not that I don’t like the film, but that I have no time for it.

4.目的状语从句

真题应用

One who loves birds should plant trees so that the house shall be surrounded with hundreds of shady branches and be a home for birds.（22翻译）

目的状语从句通常由下列连词引导：so that（为了、以便），lest（以免、以防），in order that（为了、以便），for fear that（唯恐），in case（以防、以免）。

Eg: Study hard so that you can pass the entrance examination.

He has been working hard so that he could achieve his goals.

He emphasized it again and again, lest she (should) forget.

I’ve brought some sandwiches in case we get hungry. 

5.结果状语从句

真题应用

Chloe's age group is spending so much time on their phones at home that they are missing out on spending time with their friends in real life.（21阅读）

   结果状语从句通常由下列连词引导：that（结果、以致)，  so that（结果、以致），so…that（如此……以至于），such…that（如此……以至于）。

Eg: The problem is so complicated that it will take us much time to work it out.

He made such an inspiring speech that everybody got excited.    

His statement was clear that everybody was convinced．

The hall was crowded with people so that they couldn’t get in.

6.条件状语从句

真题应用：

1.This increase means that most students can get into money trouble   2    they do not know how to manage their money.（21选词填空）

2.If phones are not recycled, more and more of these metals  8   to be mined to keep up with the demand for new models.（22选词填空）

3.If you don't have the answer, you go to them and you still make them work with you-it's not always easy, but when you're close to them, it's definitely easier."(24阅读)

4.But self-driving cars, if they one day are widely used, could have more cooperative programming.（25阅读）

条件状语从句通常由下列连词引导：if（如果) ,  unless  (除非) ,  suppose  (假如) ,  providing that (假如) , provided that（假如），on condition that (如果) , as (so) long as (只要），in case（如果）。

Eg: If you are asked to finish the task, you'd better get down to doing it.

If it doesn’t rain tomorrow, we will go to the park.

As long as you work hard,you will achieve your dream.

Where will you go for a holiday providing that you have 10 days off from work?

The postman refused to send him letters unless the dog was chained.

7．比较状语从句

真题应用：

1.The US  3   has more than a quarter of a billion phones ready to be recycled...（22选词）

2. The sooner you invest, the greater your returns will be. (22选句子)

3.The earlier you start the quitting process,the more smoke-free years you can invest in your happiness account.(22选句子)

4.The sooner kids are taught physics and taught it well, the better, she says. （24阅读）

比较状语从句通常由下列连词引导：as…as（像……一样），than（比……），not as…as（不像……一样），not so as（不如……），not the same/such…as（不如……），the 比较级…the 比较级…（愈……愈……）。

Eg: She works as fast as a skilled worker．

I know you better than he．

Your watch is not the same as mine．

You are more careful.You will make fewer mistakes.

=The more careful you are, the fewer mistakes your will make.

You work harder. You are more likely to achieve your dream.

=The harder you work ,the more likely you are to achieve your dream.

8. 方式状语从句

真题应用：

1.As you can see, there is more to learn at university than just 10   is taught in the classroom.（21选词）

2.Just as financial planners advise their clients to engage in specific behavior,we can all teach ourselves to do some specific things at any age.(22选句子)

方式状语从句通常由下列连词引导：as（像……，如同……），as if（好像），as though（好像、仿佛）。

Eg: Please state the fact as they are．

Just do it as I told you.

We carried out the plan as(we were)hoped.

I remember the whole thing as if/as though it happened yesterday.

The vase is so hard,as if it were made of steel.

The way you speak to me, I feel upset.

We teach our children the way our parents have taught us.

9.让步状语从句

真题应用：

1.Even if you are not ready to become a minimalist, you may want to consider reducing the number of things.(21阅读)

2.The point is to find people with whom you can grow,no matter what comes your way.(22选句子)

3.Although he may have slowed down a bit over time, he __5__ gets knocked off the table and his success at the sport is all about technique.(25选词)

4.So whether the weather is good or bad, we need to keep exercising.（25选句子）

让步状语从句通常由下列连词引导：though（虽然），although（虽然），even if/though（即使），as（尽管，用倒装结构），whatever（无论什么），wherever（无论哪里），whenever (无论何时)，whoever（无论谁），however（无论怎样），no matter what/where/when/who/how（不管什么/在哪儿/何时/是谁/怎样）, whether ... or not（不论……还是……）。

Eg: Even if he had devoted himself to studying, he still found it hard to satisfy his teacher.

His parents will satisfy whatever he needs.

=His parents will satisfy him, whatever/no matter what he needs.

Rich as he is, he is very mean with money．