人教版(2019)选择性必修第三册Unit 2 Healthy Lifestyle Grammar 语法讲解课件(11张ppt)

文档属性

名称 人教版(2019)选择性必修第三册Unit 2 Healthy Lifestyle Grammar 语法讲解课件(11张ppt)
格式 pptx
文件大小 188.9KB
资源类型 教案
版本资源 人教版(2019)
科目 英语
更新时间 2023-02-24 21:14:44

图片预览

内容文字预览

(共11张PPT)
Unit 2
HEALTHY LIFESTYLE
Period 3: Grammar
课前候背
1.rely/depend/count on 依赖;依靠;reliable adj.可信赖的;2.“立即,马上”的表达:
straight away ,at once, in no time, immediately ,in an instant=instantly
3.pessimistic/ pes 'm st k/ 悲观的optimistic/ ɑpt 'm st k/ 乐观的
4.arrive at/come to/reach a decision作出决定
5. bear/keep ...in mind 牢记……
have ...in mind 考虑;打算
fix one's mind on专注
come to mind想到
6.compose v.组成/作曲 --composition作文/创作
be compose of 由......组成
预习检测:
1.To prevent harmful habits like these from dominating a teenager’s life is essential.
2.To change bad habits is never easy, even with many attempts.
3.However, during this period, it can be easy for some of them to form bad habits.
4.After all, it is not easy to break bad habits.
5.When to go there has not been decided yet.
【总结】
1.1-4句子中动词不定式都是作___语。
2.句3和句4中it作______,真正主语是后面的_______。
3.句5中是______ +不定式作主语

形式主语
to do
疑问词
不定式作主语的用法1
1. To change bad habits is never easy
2.To change or to be changed is a question we have to think about every day.
3.When and how to go there has not been decided yet.
系动词前的habits为复数, 为何谓语动词用is?
Tip 1:动词不定式作主语时,谓语动词用单数.
不定式作主语的用法2
1. To change bad habits is never easy
→It is never easy (for you) to change bad habits.
vs It is clever of you to work out the difficulties.
→2.It is a challenge to change bad habits.
→3.It takes time to change bad habits.
Tip 2:为保持句子平衡,用it来作形式主语,相关句型有:
①It is/was+形容词+(for/of sb)+动词不定式
形容词修饰动词不定式这件事时,此时常用介词for。
形容词修饰表不定式的逻辑主语时,则用介词of。
②It is+a/an+名词(如a pity/an honour ...)+to do ...
③It takes/costs/requires ... sb/sth to do sth
=You’re clever to work out the difficulties
不定式作主语的用法3
1. When to go there has not been decided yet.
=When we will go there has not been decided yet.
2. _____to watch online hasn't been decided.(周测1变式)
Tip 3 疑问词+to do可作主语,相当于一个主语从句。
疑问词包括疑问副词when、where和how及疑问代词who(m)、what、which、whose。连接词whether也适用。
What
【典例1】
1._______ (look) after the safety of the community is his responsibility.
2.How _______ (cure) this kind of illness is still unknown.
3.It seemed selfish of him _________________________.
他不给员工任何东西,这显得他太自私了。
4.It seems a pity __________________拒绝这邀请似乎是遗憾的
5.It's unwise ______________________________.
他们拒绝(采纳)这个建议是不明智的。
【典例2】
1.It took us about two hours______ (get) there that day.
2.It is no use _______(argue) with him,for he is so stubborn.
3.解决这个具有挑战性的问题非常难。
①______________________________________________(动词不定式作主语)
②______________________________________________.
(it作形式主语)
To look
to cure
not to give his employees anything
to refuse the invitation
of them to turn down the proposal
to get
arguing
To solve the challenging problem is quite difficult.
It is quite difficult to solve the challenging problem.
易错易混点
1. It is never easy to change bad habits.
2. It is no use crying over the spilt milk.
Tip 1 “It+be+no use/good/help/need...”后用doing作主语
3. To see is to believe.=Seeing is believing.
4. Doing exercises regularly is good for your health
To do exercises this morning will help you feel better later.
Tip 2 主语用了动名词,表语和宾语也要用动名词
Tip 3 不定式常表示具体的某一动作;
动名词表示泛指或一般的抽象的概念。
1.It’s necessary________(refresh) the traditional technical concept and enhance production efficiency..
2.According to psychology,______(give ) someone a cue repeatedly can be misleading.
3.It is foolish of you_______(take) a taxi to the town in that situation.
4.It is important for her _________(prepare) for the examination.
5.The boy was so young that he couldn’t decide which one_________(choose)
to refresh
giving
to take
to prepare
to choose
【训练检测】
【训练检测】
1.It’s a great honour ____________ to Mary’s birthday party.被邀请参加玛丽的生日派对是一件很荣幸的事情。
2.It is difficult for us______________________________ ___________________我们难以在15分钟内写完这篇作文。
3.It is stupid of you_______________________________ =你把老师说的所有都记下来是愚蠢的。
4. _______________,and it is hard work that can change your present terrible situation.
哭没有用,而且只有努力才能改变你现在糟糕的处境。
5.It is a great honour for me ______________________ on how to get along well with your parents.
我很荣幸与你分享如何与你父母和睦相处的观点。
to be invited
to finish writing the composition in a quarter of an hour
to write down everything the teacher says
It is no use crying
to share with you my opinions
A young man,while 1. (travel) through a desert,came across a spring of clear water.The water was sweet. He filled his leather container so that he could bring some back to an elder 2. had been his teacher. After a four-day journey,the young man presented the water to the old man. His teacher took a deep drink,smiled warmly,and thanked his student very much 3.___ the sweet water.The young man went home with a happy heart.After the student 4.____(leave),the teacher let another student taste the water.He spat(spit吐) it out,5.______ (say) it was awful. Obviously,it was no longer fresh because of the old leather container.He asked 6.___(he) teacher,“Sir,the water was awful.Why did you pretend 7.______(like) it?” The teacher replied,“You tasted the water. I tasted the gift. The water was 8.______(simple) the container for an act of kindness and love. Nothing could be 9.______ (sweet).”
We understand this lesson best when we receive gifts of love from children.Whether it is a cheap pipe 10.___a diamond necklace,the proper response is appreciation. We love the idea within the gift rather than the thing.
travel(l)ing
who/that
for
left
saying
his
to like
simply
sweeter
or