Unit 5 Discovering Useful Structuresppt课件-(2022新)人教版高中英语选择性必修第一册.pptx

1、step 1 探究发现探究发现01Part One用适当的连接词填空并体会其语法特征1(教材P50)However, _ concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.2(教材P50)However, _it was possible to develop a hybrid of selfpollinating plants such as rice was a matter of great debate.

2、whatwhether 3(教材P50)Today, it is estimated _ about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains.4(教材P51) _ impresses people most about Yuan Longping is his ongoing ability to fulfil his dreams.5(教材P53)It surprised the whole world _ Yuan L

3、ongping had realised his dream of developing seawater rice.thatWhatthat我的发现1以上考查的都是主语从句的_。2例句1、4中的what在从句中作_。3例句2中的whether在从句中不作成分，但有意义，意为“_”。4例句4、5中的it是_，真正的主语是后面that引导的从句。连接词主语是否形式主语step 2 归纳总结归纳总结02Part One知识点总结知识点总结 02Part One二、主语从句的连接词及其句法功能 1连接词that和whether/if 2连接代词(who、whom、whose、what、which、w

4、hichever、whoever、whomever、 whatever等) 3连接副词(when、where、how、why等)一、主语从句的定义 在主从复合句中充当主语的从句即为主语从句。What made people excited was that the solar ship had completed around-the-world trip.让人们激动的是太阳能船已完成了环游世界的旅行。1连接词that和/if(1)that在从句中不充当任何句子成分，本身无任何意义，只起连接作用,但不可省略。That my parents always treat me as a little

5、 child makes me very unhappy. (2)whether/if在从句中不充当任何句子成分,起连接作用，意为“是否”,不可省略。Whether the plan will be carried out is still unknown.It is still unknown whether the plan will be carried out. 2连接代词(who、whom、whose、what、which、whichever、whoever、whomever、whatever等) 连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。Who will go t

6、o the concert is not known.不知道谁会去音乐会。3连接副词(when、where、how、why等)连接副词引导主语从句并在从句中作状语。How this happened is not clear to anyone.这件事是怎样发生的，谁也不清楚。When we will have a meeting is an important question.我们何时举行会议是一个重要的问题。Where I spend my summer is no business of yours.我在哪里过暑假不关你的事。step 3 实战演习实战演习 03Part One Gra

7、ndma has been complaining about the vegetables sold in the supermarket, which have been grown using chemical fetilisers. To her, that they look beautiful on the outside is obvious. However, what she is unhappy about is the lower nutritional value and reduced flavour. Now that both of my grandparents

8、 have retired from their jobs in the city, how they are going to spend their retirement is an important decision for them. Whether they can live a healthy life is the first thing they are considering. So they have made up their minds to move to the countryside, where they can live a gree life.Practice Practice samples:samples:Thanks