Unit 10If you go to the party, you'll have a great time! Section A (Grammar Focus-3c)课件(共29张PPT)人教版八

(共29张PPT)
Section A
(Grammar Focus-3c)
If you go to the party，you'll have a great time！
Unit 10
什么是复合句？什么是主句，什么是从句，什么是条件状语从句？条件状语从句在时态方面有什么特点？如果同学们有疑问的话，这节课我们就一起来解开这些疑团。
Grammar Focus
I think I'll take the bus to the party. If you do, you'll be late.
I think I'll stay at home. If you do, you'll be sorry.
What will happen if they have the party today？ If they have it today, half the class won't come.
Should we ask people to bring food？ If we ask people to bring food, they'll just bring potato chips and chocolate.
(一)if 引导的条件状语从句
语法讲解
考点 1
当主句用一般将来时时，if引导的条件状语从句用一般现在时，我们称之为“主将从现”原则。
eg：If it rains tomorrow，I'll stay at home.
如果明天下雨，我将呆在家里。
考向一
if 引导的条件状语从句的时态与主句的一致性。
【重点】
You will see many aunts dancing together on the square if it________ in the evening.
(连云港)
A．doesn't rain　　　　B．rains
C．will rain D．won't rain
【解析】本题用语法判定法。句意：如果晚上不下雨，你会看到许多阿姨在广场上一起跳舞。当主句是一般将来时时，if引导的条件状语从句用一般现在时(即主将从现)。
典例
A
unless引导条件状语从句时，主句为将来时，从句用一般现在时表示将来(即主将从现)。unless本身就表示否定，在意义上相当于“if ...not”，其引导条件状语从句时与“if ...not”，两者可以互换。
eg：I will go there unless it rains.
＝I will go there if it doesn't rain.
如果不下雨，我就去那里。
【重点】
拓展
You won't pass the exams ________ you work hard. (遂宁)
A．if　　　　B．unless　　　　C．so
【解析】本题用语境判断法。句意：如果你不努力学习，你考试就会不及格。unless除非；如果不，在意义上相当于if ...not。
典例
B
如果主句含有must，may，can 等情态动词，
if引导的条件状语从句也用一般现在时。
eg：If you drive too fast，you may have an accident.
如果你开得太快，你可能会出交通事故。
考向二
考向三
如果主句是祈使句，if引导的条件状语从句同样用一般现在时。
eg：Tell Tom to ask Jack for help if he still has problems with his schoolwork.
如果汤姆学业方面还有问题，告诉他去找杰克帮忙。
if引导的宾语从句与if引导的条件状语从句的时态区分。
if引导宾语从句时，当“是否”讲，时态根据其主句而定：★当主句是现在的某种时态时，if从句的时态根据实际情况而定。★当主句是过去的某种时态时，if从句要用过去的某种时态。
eg：Lucy asks Tom if he'll travel around the world one day.
露西问汤姆他是否有一天会去环游世界。
I didn’t know if he was right or not before you
told me that.
在你告诉我那件事之前，我不知道他是否是正确的。
考点 2
【难点】
—Can you guess if they ________ to play basketball with us
—I think they will come if they ________ free.
A．come；are　 　B．will come；will be
C．will come；are D．come；will be
【解析】本题用语法判定法。第一个if 引导宾语从句，意思是“是否”，由句意可知应用一般将来时。第二个if引导条件状语从句，且主句是一般将来时，从句应用一般现在时表将来。　
典例
C
(二)情态动词should 表建议
作为情态动词，should 符合情态动词的一般用法：后加动词原形(do)；变否定句时在should 后加not，即shouldn't；变疑问句时，把should 提到主语前。
eg：What should I do if I want to be famous
如果我想出名，我应该做什么？
考向
除用情态动词should 表建议外，还有一些常用的表建议的句型，归纳如下：
1．Let's (not) do...
2．Why don't you do...？＝Why not do...
3．What/How about doing...
4．...had better (not) do...
5．It's best (not) to do...
6．It's better (not) to do...
7．Don't you want to...
拓展
Fill in the blanks with the correct forms of the verbs in brackets.
Dear Su Mei,
I don't________(know) what to________(do) about going to Mike's birthday party tomorrow night. My parents________(think) I should study for my English exam next week. If I________(go) to the party, they________(be) upset. Mike________(tell)
3a
know
do
think
go
will be
told
us to wear nice clothes, but I don't ________(have) any. If I________(wear) jeans, I____________ (look) the worst. Also, I'm not sure how to________(go) to the party. If I ______(walk), it _________ (take) me too long. If I__________(take) a taxi, it____________(be) too expensive. Can you give me some advice please
Tina
have
wear
will look
go
walk
will take
take
will be
advice / d'va s/ n.劝告；建议
考向一【重点】
advice 作“建议”讲时，是不可数名词，而suggestion是可数名词。如果想表示“一条建议”则用a piece of advice。
知识点
eg：Your English is pretty good. Can you give some advice to me
你英语很好。你能给我些建议吗？
—Miss Li，could you give me ______ on
English learning
—Certainly. First you should speak English
every day. (广安)
A．any advices　　　B．many advices
C．some advice
【解析】advice 作“建议”讲时，是不可数名词，因此无复数形式。　
C
典例 1
Could you please give some ________ to the ________ teachers？(安顺)
A．advice；man 　B．advices；men
C．suggestion；man D．suggestions；men
【解析】advice是不可数名词，没有复数形式，排除B；some一些，它后面的可数名词suggestion不能用单数形式，排除C；man后面的teachers为复数，man也要变为其复数形式men，排除A。
D
典例 2
考向二
advice的常用短语
give sb. some advice 给某人一些建议
give advice on sth. 在某方面给出建议
take/follow sb.'s advice 听从某人的建议
ask sb. for advice 向某人征求意见
eg: My parents always give me some good advice when I am in trouble.
当我遇到困难时，父母总会给我一些好的建议。
I think you'd better follow your friend's advice.
我认为你最好听从你朋友的建议。
Complete the sentences using your own ideas.
3b
1. If I get up late tomorrow,
.
2. If I don't finish my homework,
.
3. If I don't get enough exercise,
.
4. I will not have enough time to study if
.
5. I will not make any friends if
.
I’ll be late for class
the teacher will be angry with me.
I’ll not be very healthy.
I watch TV after school.
I am too shy.
Write a story with your group on a piece of paper. The first person begins the story with “I think I will...” The others add sentences with “if”. Pass the paper around twice. Then read the story.
3c
I think I will go to the movies tonight. If I go to the movies, I won't finish my homework. If I don't finish my homework ...
本节课主要学习了单词advice的用法以及本单元的重点语法知识。
一、用所给词的适当形式填空
1．If I see him again，I ________ (tell) him what you say.
2．What ___________(happen) if they don't agree with each other
3．If given more time，I _______ (do) it better.
4．What will he say if he ______ (find) out the truth
5．If the train ___ (be) on time，it will be here in ten minutes.
will tell
will happen
will do
finds
is
二、单项选择
6．(重庆A)Stop smoking, Joe! You ________ yourself
if you keep on doing it like that!
A . will kill B．have killed
C．kill D．killed
A
【解析】考查时态。句意：Joe，戒烟吧！如果你继续那样做，你会害了自己的！由if引导的条件状语从句用一般现在时表将来，推断出主句中应当用一般将来时。所以选A。
7．(中考·威海)Why not look up the new word in a
dictionary________ you don't know it
A．if B．that C．though D．Whether
A
【解析】句意：如果你不认识那个新单词，为什么不查词典呢？if如果，引导条件状语从句；that引导宾语从句，没实际意义；though虽然，引导让步状语从句；whether是否，引导宾语从句。根据句意及选项分析，可知选A。
8．(中考·呼伦贝尔)The earth will be more and more beautiful if everyone________ his best to love it.
A．try B．tries C．will try D．has tried
B
【解析】句意：如果每个人都尽他最大的努力热爱这个地球，那么它就会越来越美丽。try one's best to do sth.，尽某人最大努力做某事。这句话中if引导的是条件状语从句，从句中应该用一般现在时态，主语everyone是不定代词，谓语动词用单数，故选B。
9．(江西)There will be less pollution ______ more people use public transportation.
A．but B．though
C．unless D．If
D
【解析】考查连词的用法。句意：如果更多人使用公共交通，那么将会有更少的污染。but但是；though尽管；unless如果不；if如果。根据句意可知这两句表示假设关系，故选D。
10．(武威)Learning to write is learning to think. You will know things more clearly _____ you write down.
A．or B．unless
C．if D．whether
【解析】考查连词。句意：学习写作就是学习思考。如果你写下来，你将会了解得更清楚。or或者、否则；unless除非；if如果；whether是否。根据句意，故选C。
C
1.熟记本课时的词汇
2.完成本课时的课后作业