高中英语外研版 (2019)选择性必修 第四册Unit 3 The world meets China背景图ppt课件

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状语从句状语从句一般分为九种，它们是：时间状语从句；地点状语从句；原因状语从句；条件状语从句；目的状语从句；结果状语从句；方式状语从句；让步状语从句；比较状语从句。一、时间状语从句；地点状语从句；原因状语从句；条件状语从句[观察例句]观察下列句子并指出所用的状语从句1．We should go where the Party needs us most.地点状语从句2．The last time she saw James，he was lying in bed.时间状语从句3．If you see him，give him this note. 条件状语从句4．Now that everybody is here，let's begin our meeting.原因状语从句[归纳用法]1．引导时间状语从句的有：(1)as，after，before，directly，immediately，once，since，till，until，when，while，whenever 等连词。(2)as soon as，the moment/minute，every time，each time，next time，the first/last time，any time，by the time，the day/year等短语。2．引导地点状语从句的有：where，wherever，everywhere，anywhere等连词。3．引导原因状语从句的有：because，as，since，now that等连词。4．引导条件状语从句的有：if，unless，as/so long as，in case，on condition that，provided/providing(that)，supposing/suppose(that)等连词。[即学即练1]　单句语法填空①While/When I was reading，he came in.②You'll be late unless you get up earlier.③The old man asked Lucy to move to another chair because he wanted to sit next to his wife.④We must camp where we can get water.二、目的状语从句；结果状语从句；方式状语从句；让步状语从句；比较状语从句[观察例句]观察下列句子并指出所用的状语从句1．Although he may be troubled，he always presents a calm smiling face.              让步状语从句2．Mike is such an honest man that we all believe in him.结果状语从句3．I have changed it as you suggested. 方式状语从句4．I'll speak slowly so that you can make sense of what I will say.              目的状语从句5．He runs faster than I(do)． 比较状语从句[归纳用法]1．引导目的状语从句的有：so that，in order that，in case，for fear that等。2．引导结果状语从句的有：so that，so...that...，such...that...。在非正式语体中，由so...that...，such...that...引导的句子中的that可以省略。3．引导方式状语从句的有：as，as if/though。4．引导让步状语从句的有：although，though，as，while，even if/though，whether...or(not)，“no matter＋疑问词”与“疑问词＋­ever”。5．引导比较状语从句的有：as...as，not as/so...as，the same...as，比较级＋than。[名师点津]1．although引导让步状语从句时，只能用正常语序； though引导让步状语从句时，可用正常语序，也可用倒装语序；as引导让步状语从句时只能用倒装语序，即从句中的表语、状语或动词原形置于句首，若表语是单数名词，前置时要省略冠词。2．although与though都可以与yet，still，nevertheless连用，但不能和but连用。3．while引导让步状语从句时，一般置于句首。4．“疑问词＋­ever”还可以引导名词性从句；“no matter＋疑问词”只能引导让步状语从句。5．so that与in order that引导目的状语从句时，常与can，could，may，might连用；in order that 引导的目的状语从句可以置于主句前或后，但so that引导的从句只能置于主句后。[即学即练2]　单句语法填空①Tom is so independent that he never asks his parents' opinion unless he wants their support.②On our way to the house, it was raining so hard that we couldn't help wondering how long it would take to get there.③If we don't stop climate change, many animals and plants in the world will be gone.④Unless you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.Ⅰ.单句语法填空1．Although/Though/While scientists have learned a lot about the universe, there is much we still don't know.2．If you don't understand something，you may research, study, and talk to other people until you figure it out.3．It will be three years  before they meet again.4．This photo of mine was taken where stood the famous Eiffel Tower.5．I was driving down to London when I suddenly found that I was on the wrong road.6．Let's not pick these peaches until this weekend so that they get sweet enough to be eaten.7．Although/Though/While birds use their feathers for flight，some of their feathers are for other purposes.8．He pushed everyone full speed ahead until production hit a bottleneck.9．Located where the Belt meets the Road，Jiangsu will contribute more to the Belt and Road construction.10．Over time，when/as the population grew，people began cutting food into small pieces so it would cook more quickly.Ⅱ.短文语法填空Parents and grandparents are understandably proud of the quick minds and 1.impressive (impress)talents of their little ones.But let me tell you about another quality，perhaps even more important，2.found (find)in a little girl named Skylar.Ever 3.since  Skylar learned of Disneyland from TV，she saved her nickels and dimes in a piggy bank in the hope of visiting there someday.4．When Skylar returned it was Christmas time.She decided to buy presents with her savings，but she also learned from 5.announcements (announcement) on TV about a local homeless shelter called “The Road House”．6．On Christmas Eve，she and her family drove to the shelter 7.where Skylar presented her Christmas box to a grateful little girl.She was 8. so filled with joy at truly helping someone else that her family decided 9.to make(make)the journey to the homeless shelter an annual tradition.It is that quality，above all these，10.that makes beautiful people.